Chapter I: Epilogue: 299 (1)

BIBLIOGRAPHY 300

WHERE TO BUY MINIATURE PLANTS AND SUPPLIES 301

INDEX 307

List of Illustrations

COLOR
_By the author except as noted_

BETWEEN PAGES

Formal garden in a wash-boiler lid 32–33

Tiny tropical garden with pool 64–65

Achimenes, a beautiful gesneriad 96–97

Twenty-three varieties of miniature and dwarf geraniums 128–129

Streptocarpus, Weismoor hybrid 160–161

Rose and miniature rose 192–193

Garden in the landscape 224–225

Rock garden effectively composed 256–257

BLACK AND WHITE
_By the author except as noted_

Miniature geraniums in uniform rows 20

Mexican motif with cacti in window box 21

Child’s cactus garden over radiator 21

Small plants in a lighted bookcase 25

An indoor “jungle garden” 26

Light-case planted with various small plants 28

Light shelves with begonias 29

Kenilworth ivy in gnome strawberry jar 40

Pawnbroker’s planter with ivy 41

Pruning a dish garden 43

Apple-tree root with pocket for plants 45

Miniature plants in fish bowls 54
(_Industrial Photographic Specialists_)

Converting a cider jug into a terrarium 56–57

Commercially produced terrarium (_Russ Stone_) 65

Author’s succulent garden 68

Rampant greenhouse 69

Unusual propagation box 87

Sprouted stem cuttings of dwarf geraniums 88

‘Spaulding,’ bushy dwarf begonia 98

Group of dwarf begonias 99

_Caladium humboldti_ 108

Miniature climber, _Cissus striata_ 112

Ivy meagheri 119

_Helxine soleiroli_ 121

_Leuconeura massangeana_ 123

_Oxalis hedysaroides rubra_ (_Merry Gardens_) 125

Three dwarf geraniums (_Merry Gardens_) 127

Dwarf geranium, ‘Robin Hood’ (_Merry Gardens_) 127

Creeping _Pilea depressa_ 130

Hardy _Saxifraga sarmentosa_ 133

_Sinningia pusilla_, miniature of miniatures 135

A miniature rose grows 146–147

Miniature garden of dwarf evergreens 152

Rock garden in a wash-boiler lid 157

Variety of bonsai trees 162

Bonsai in citrus 163

White poppies in a tiny garden 178

Raised flower bed 186

Saxifraga seedlings 188

Trimmed lemon thyme and ivy 194

Constructing a no-cost pool 204–205

Wild garden in New York City 213

Bloodroot 214

Juniper with pansies 245

Planted cold frame 257

Author in her $00.00 greenhouse 279

DRAWINGS

Dream greenhouse (_Kathleen Bourke_) 66

A fancy to build on (_Kathleen Bourke_) 67

Foliage details of five popular miniature trees and shrubs
(_Fritz Schaefer_) 237

Construction diagram for low-cost greenhouse
(_Hal Gearhardt_) 280

AUTHOR’S NOTE

Naturally, the children’s welfare was the compelling reason for moving our family out of New York and into Connecticut. But we can’t deny that we also had visions of more expansive gardening. So we set out to find an old (meaning dilapidated--not antique), spacious, window-rich house with acres of neglected land where we could indulge our yen for flower borders with delphiniums by the dozens, sweeping green expanses of lawn, even obese bullfrogs on lily pads in a modest lake.

These naïve notions were quickly canceled by the orbital prices of Connecticut real estate. In order to achieve our principal purpose, we had to make concessions to the second. The house we settled for is small; its windows are few and runty; and it has less than an acre of cultivatable land. It is one hundred feet at its widest, nearly six hundred feet long, and less than a hundred feet level in any one expanse. In other words, we got split-level land instead of a split-level house. But it is charming. Neighbors with great expanses of gardens and lawns actually envy us for our “natural setting.”

Actually, my favorite landscape architect, who happens to be my husband, Bob, would be lost if given a perfectly flat piece of land of equal length and width. He would have no contours to follow and would probably go fishing. As it is, both of us have plenty of challenges and the fun of running up and down ridges in our plantings. The acreage is ample for two persons who have little more than so-called “spare” time.

From this quick summation of facts, it is obvious why we gave up our grandiose ideas of immense perennial beds, a half-acre vegetable plot, naturalized bulbs by the thousands. Instead, we’ve learned how to tuck little gardens into odd corners; to compensate for limited space with intimate miniature perfection; to hunt for and find the small plants that are in sympathy and in scale with our small house and landscape. Cramped growing quarters indoors have even led us to collect miniature house plants. And when, some sweet day, we have our own personal greenhouse on the place, it’s bound to be in scale with the rest of it.

Fortunately, we are by no means a minority. More small homes than large are being built today, and on more small lots. Gardeners are intensifying their demands for small plants of all sorts; and hybridists and suppliers are working nobly at filling the need. We now have four-inch ‘Wee Willie’ sweet William, tiny Twinkle Phlox, other dwarf annuals and perennials. Some nurseries are beginning to feature dwarf trees and shrubs. Florists and greenhouses are giving us minuscule house plants such as _Sinningia pusilla_ and orchids with one-inch flowers. The charm and intimacy of the miniature is replacing the magnificence (and oppressive maintenance) of the massive.

There you have the beginning of this book and the reason why it contains many quite new projects. They would be illustrated as “before and after,” except that the “after” is yet to be written. Regardless of how long miniature gardening has been practiced, we feel the greatest developments are yet to come. Small houses and small plots of land force us to this conclusion.

Admittedly many of our personal opinions are based on experience and observations in Northeastern gardens. However, whenever possible we have included reliable information for other climates. You will, of course, make your own interpretations and adaptations. This a reader must always do, no matter where an author lives and gardens. And there is always your county agent to consult or your local garden-supply florist with whom to discuss your particular situation. Always an added pleasure.

PLANTS INCLUDED

As the author, I have used two criteria for including or omitting plants at the time of writing. I am concerned with those that are readily available from florists, nurseries, and the suppliers listed in the Appendix; and those that in my opinion are suitable for miniature gardens.

Except for the specific art of bonsai, I have not included plants that are unnaturally dwarfed by pruning or other means. I have omitted plants that look like miniatures when they are young, grow slowly, but eventually get out of miniature proportions if given time. I have not attempted to differentiate between miniatures and dwarfs, nor have I set up restrictive dimensions. Sizes vary with types of plants. A miniature orchid may be three inches high, a miniature shrub three feet or more.

PLANT NAMES

This book has been written by an amateur gardener for other amateurs; and I have made it as readable and enjoyable as I could. But in the interests of clarity and accuracy, Latin botanical names are used in preference to the vernacular. This is the only way to be sure plants are correctly identified. Popular names are confusing. Kenilworth ivy, grape ivy, and English ivy certainly sound as if they were related in some way; but when you use botanical names (_Cymbalaria muralis_, _Cissus striata_, and _Hedera helix_, you know they are not. By using the botanical names you are more likely to find the ivy you want in a reference book or catalogue.

For most plants, _Hortus Second_ has been used as the authority for identification and spelling of names; but in the interests of readability, the double _ii_ ending has been reduced to a single _i_. For a number of plants that have become available since _Hortus_ was last revised (1941), I have referred to _Exotica II_, by A. B. Graf.

Unless a plant name is complete (genus plus species--plus variety, if any), it is neither capitalized nor italicized. (The caladium is a favorite foliage plant.) Complete botanical names are italicized, but only the generic name has an initial capital letter, even when the specific name has been derived from the proper name of some person or place. (The diminutive _Caladium humboldti_ needs humidity.) When you see a plant name in italics, you will know that this is a recognized botanical species or one of its varieties, and not a man-made hybrid.

The names of recognized hybrids, seedlings, and mutations of either or both are not italicized, but are capitalized and enclosed in single quotation marks (caladium ‘Little Rascal’). Common or popular names are set in regular type with initial capital letters only for proper nouns, when they appear in text. In separate listings each word is capitalized.

BOTANICAL TERMS

In order to make a gardening book completely accurate and understandable, it is almost mandatory to use some so-called “scientific” terms which should really be as much a part of a gardener’s vocabulary as “annual” or “evergreen.” The following words are used in their technical sense:

_Genus_ (plural, _genera_)--A group of plants related to each other by botanical characteristics. The name of the genus is like a human family’s surname, Smith, but it is written first instead of last. _Oncidium_ is a genus of orchids.

_Species_ (plural, _species_)--A plant that differs from others within a genus, usually occurring in a natural state and capable of reproducing itself in identical form. The name of a species is like a person’s first name, Alice, but is written last. _Oncidium pusillum_ is one of several species in a genus of orchids.

_Hybrid_--Generally the result of fertilizing the flowers of one plant with the pollen of another; the resulting seedlings are hybrids.

_Mutation_ or _sport_--A variation in any part of a plant that remains constant when that part is severed and propagated.

The word _variety_, however--although it has a strict botanical application--has been used more loosely and may often be defined here simply as “variation.”

ACKNOWLEDGMENTS

I wonder if anyone ever wrote a book without being indebted to many persons for some sort of help or inspiration. Certainly, I couldn’t do it. Subtract the encouragement and time-consuming assistance of my family, friends, and horticultural acquaintances, and this would be less a book.

I am deeply grateful to: Fritz Schaefer for landscape designs and drawings of rare delicacy, and for letting me benefit by his wide horticultural training and talents; to Kari Berggrav for her enthusiastic contributions to the manuscript and for all sorts of help with plants and photographs; to Mrs. John Lee and to F. H. Michaud of Alpenglow Gardens for their help and the use of their artistic photographs; to Adolph Adukas of the Julius Roehrs Company for his talented arrangements of dish gardens; to Kathleen Bourke for her fanciful drawings and to Elvin McDonald of McDonald and Bourke for his assistance and advice; to _Flower and Garden_ for allowing me to adapt material that had appeared in that magazine; to Mary Ellen Ross of Merry Gardens for her assistance and the photographs of miniature plants she allowed me to use; and to all the friends and tolerant gardeners who allowed me to put my camera tripod in the midst of their plants--Mr. and Mrs. H. Lincoln Foster, Mr. and Mrs. Alex O’Hare, Mr. and Mrs. Norman Cherry, and our neighbors, Mr. and Mrs. Henry Fuller. To Ernesta Ballard and Peggie Schulz, well-known garden writers, and Mrs. N. E. Dilliard of Tropical Gardens, my gratitude for your assistance. I thank my mother, Alice Gaines, and her keen eye for catching my witless errors.

ALL ABOUT
MINIATURE PLANTS AND GARDENS,
INDOORS AND OUT

_CHAPTER 1_

MINIATURE
WINDOW GARDENS

In a living room so small that two dogs asleep before the fire must be roused to let you pass through, monstrous cut-leaf monstera would be out of place--literally and most certainly no asset. In our house, to be truthful, anything larger than a three-inch pot begins to get out of proportion. When we were buying the place, we called it “quaint” and “cozy.” But when we moved in our favorite house plants, it was just too crowded for words.

This was the origin of our intense interest in miniature house plants. But limited space is by no means the only reason why these little fellows are such cheerful and desirable indoor decorators.

First, of course, there’s the charm of the diminutive--the same lure that leads some people to collect figurines or doll’s furniture. But plants are alive and growing; you can pore over each leaf and flower as it matures to small-scale perfection.

Because miniature plants occupy little space, you can grow more of them, and in greater variety. Three dwarf geraniums will bloom their heads off where a single large one might be crowded. Modern, narrow window sills are adequately spacious for a dozen or so two-inch pots of colorful cacti. One cattleya orchid can be replaced by several equally exotic, and much more personable, dwarf “botanical” orchids in delightful variety. Where full-sized narcissus and “daffy’s” that have been forced often seem to be just that, “forced,” miniatures fit in, add gaiety and color, along with naturalness.

Most important, miniature plants and gardens are thoroughly in tune with today’s decorating trends. They’re in scale with small rooms and low ceilings, in harmony with the spirit of suburban homes, mobile enough to facilitate change and rearrangement, even functional because they’re more carefree. And they certainly go along as we leave last year’s stark, bare, uncluttered look behind and move toward the warmer, more personal décor that once more allows us to display snapshots of the children on the mantel.

Miniature plants are often less costly than large specimens, and require less care. They grow slowly, require fertilizing and repotting less frequently, don’t outgrow bounds, and seldom need to be renewed or replaced.

When I first started to collect miniature house plants, I had no idea how many were available, or in what delightful and wide varieties. There are miniatures in almost all of our best-known plant families, and there are some groups that have almost nothing but miniatures to offer. There are small-scale trailers, climbers, creepers; leaf rosettes or bushlets; tropical plants and mountain-dwellers; those with striking foliage, spectacular foliage, or both. Once you discover the wealth of Lilliputian plants you can grow in your home, I warn you, your will power had better be strong, else you never will stop following this fascinating hobby of raising the little fellows. It will run away with you before you know it.

WINDOW GARDENS

The window is the place most naturally suited for a living garden. It is nearest to the fresh out of doors and brings the plants closer to the environment where they are at home. By creating a transition, the plants in turn seem to bring the outdoors inside. A window is often, also, the only place where indoor plants can get the daylight and sunlight they need to keep in good condition.

But a real window garden is not a motley assortment of plants in pots, haphazardly arranged (or not arranged at all) or lined up in precise, military rows. It is an artistic composition, a grouping of plants with some sound design in mind--an arrangement of plants and their containers for pretty and refreshing effect. The more natural the plants look, the less obvious or contrived the lines of the design, the more decorative the result. This principle is, of course, integral to all kinds of gardens, indoors and out; but it is particularly vital in a window where our eyes stray a dozen times a day.

With miniature plants I find it easier to achieve good composition--much easier than with large ones. There are more elements with which to work; there is more opportunity to rearrange, a wider choice of colors, textures, and forms--the possibility of blending or playing them against each other. I recall a small window in an old country house, deeply recessed by the width of the thick stone wall. Three or four large or medium-sized plants might have stood on the two-foot-deep sill. But there were a dozen or so dwarfs and miniatures all blended and accented by two small baskets of miniature ivies. The display was so lovingly arranged and cared for, the effect was more of a garden than an obvious decoration.

(In a rich selection such as this one, there is a natural danger of “too-muchness.” Don’t crowd these plants. Just the addition of one extra pot can spoil the effect of a perfect garden. Miniatures are not meant to be massed. When crammed close together they can look like a weedy, unmown lawn. Give each plant enough space to set off its modest charm, then you’ll find each one doubly charming in its space.)

And so an assortment of small potted plants can be arranged as effectively in a window as perennials can be in a flower border. There should be a careful selection and placing of colors for both contrast and harmony; the interplay of foliage forms and textures; the blending of plants into one design with eye-catching accents where accent is needed. For a container, use a shallow galvanized metal tray made to fit the window sill and painted a matching white. It should hold about an inch of water with a layer of pebbles thick enough to keep the pots above the water. The evaporating moisture humidifies the air. Use miniature plants of several families but all needing approximately the same amount of light and sun. For color, there are the flowers of begonias and impatiens; for foliage contrast, peperomias; for accent, taller plants; with _Ficus pumila_ ascending the window frame and small-leaved creepers dangling over the edge to soften harsh lines and blend the garden into the room.

There is equal charm in a collection of miniature plants of the same general type and of nearly the same size. Neat rows of cacti and other succulents in small pots look gay and colorful lined up on the sill and on glass shelves in the window above it--glass, of course, to permit all possible sun to reach the plants. Between the pots, at irregular intervals, set a collection of crystal wine glasses or figurines. Or line up impudent miniature geraniums as in the photograph. Here, the pleasure comes, not from the artistic composition, but rather in the uniformity of the rows of small-scale pots and plants.

Miniature geraniums arranged in uniform rows]

For an indoor version of the outdoor window box, use a box made to fit on the sill, gaily painted and decorated in the Mexican spirit of the cacti growing in it. It should be deep enough (about four inches) for healthy root growth. The cacti are not potted, but planted in the sandy soil in the box. These indoor window boxes can be of all sizes and shapes--large enough to cover the sill of a big window plus the radiator under it; triangular, to fit in corner windows; suitable for the top of a child’s play table in a sunny bedroom or playroom.

All of these gardens are planned for windows with full sun, or nearly so. With less sun the choice of plants changes. For example, miniature gesneriads (African violets, streptocarpus, episcias) might be combined with ferns and other foliage plants; a selection of the widely varying types of peperomias would be effective where sun is very scarce indeed.

Mexican motif with cacti in a homemade window box]

Child’s cactus garden over a radiator--fine for a playroom]

WINDOW GREENHOUSE

Available light, or sunlight, is the first consideration in selecting plants for a window area, or in selecting the window for the plants you have or want. Light can be brighter (it even comes from overhead) inside a greenhouse that extends out from the window. You can buy these in all combinations of measurements, ready-made and assembled, or ready to be assembled. Or you can make them, or have them made, from the materials sold in most hardware stores for those who build their own screens and storm windows.

The greenhouse fits flush to the outside of the window frame and is sealed with a calking-gun after it has been screwed firmly in place. It may rest on the outside of the sill, or be supported by metal or wooden brackets on the underside. The top lifts open for ventilation, and the opening is covered with a screen. Glass shelves permit light to penetrate fully. A tray at the bottom holds moist vermiculite to humidify the air.

The window sash can be removed or not, as you wish. You can install an inexpensive, thermostat-controlled heater for extra warmth in winter.

If the light is right, and if humidity can be kept high enough, an installation such as this can contain not only all sorts of window-garden plants, but also many of those recommended for the greenhouse in Chapter 6.

A window greenhouse filled with growing, blooming plants is an attractive outdoor decoration on almost any house. Its effect indoors is always cheerful and refreshing. And it is especially suited for miniatures. Numerous small plants make a better decorative effect than a few large ones.

(_For suitable plants, please refer to list at end of Chapter 6._)

_CHAPTER 2_

MINIATURE GARDENS
WITH ARTIFICIAL LIGHT

The three tiny rooms of the Greenwich Village apartment possess a total of two narrow, old-fashioned windows; yet in its darkest corners bloom some of the most gorgeous gesneriads I’ve ever seen. In similar fourth-floor quarters on New York’s dreary 41st Street, miniature orchids and other tropicals make a flamboyant jungle. In an attic in Levittown, a cellar in Bayside, a heated garage in Westchester, plants make it look like July in January, living their life cycles over and over again without ever seeing the sun. The life they must have for existence is supplied by electricity.

Time was, when windows were the only place in the house where plants could be grown. But since government scientists first grew corn to maturity under artificial light at Beltsville, Maryland (back when I had more interest in boys and dating than in gardening), that picture has certainly changed. Now, all sorts of plants can flourish in the most unlikely places. Home decorators can use plants ornamentally wherever they look best, and create the conditions in which they grow best. The hobbyist who can’t afford a greenhouse can have a most satisfactory and inexpensive substitute in unused places in the house. And a greenhouse owner can double his growing space without adding another section of glass.

Naturally enough, scientific research in this field has been aimed at helping florists, farmers, and others to whom plants are a business; but amateurs have benefited, too. The principle of photoperiodism--that some plants set buds and flower only when nights are long, some others only when nights are short--led to delaying the flowering of commercial chrysanthemums by interrupting the long night with a period of light. Amateurs have used the same principle to force tuberous begonias to flower in winter by lengthening the day with several hours of artificial light.

The discovery and isolation of a light-sensitive enzyme, photochrome, has been applied to cyclic lighting--a less costly method of regulating flowering by flashing lights on and off at intervals. Probing the mysteries of photochrome has also given orchid fanciers a better understanding of their plants’ blooming habits and has even made it possible, with some species, to have flowers twice or three times a year, rather than just once.

If I may be permitted a slight prejudice, it’s these amateur benefits that make me happiest. I love plants; and I think millions of other people do. From the windows of my commuting train I see New York tenement tenants wistfully watering morning glories that pathetically climb fire-escape trellises. More prosperous Manhattanites spend small fortunes on florists’ plants to bring the breath of green life into their sterile apartments; and their disappointment, if the plants die, is pitiable. Suburbanites have a yen to make a hobby of collecting plants. And now they can. I know, because I did.

In our roomy, old-fashioned cellar in Bayside we had triple-decker shelves fitted with fluorescent lights where we grew everything from begonias (finally, a collection of more than 350 varieties) to annuals for the gardens out of doors. That was some years ago. The information about lighting was sparse, inconclusive, and often confusing. Our light intensity was inadequate, and there were other deficiencies which we would correct were we setting up that cellar greenhouse today. But our successes were fascinating, our failures a challenge. And the hours we spent working with those plants in the cellar often were our only moments of refreshment and relaxation.

The hobbyist, with his dividends of fun, is not the only one who benefits from this new concept of light and plants. There is the home home-decorator, the woman of the house, who finds in plants the sort of ornament the entire family enjoys. She’d like the graceful lines of a vine tumbling down from the mantel, jewel-like flowering plants on the shelf of a corner cupboard, a garden of green atop the room divider between the living and dining areas. Frustratingly, she discovers that where the plants are most effective, too often they won’t grow and flourish. It is usually because there is insufficient light for their life processes. But now, she can set up a light on the mantel, install fluorescent tubes beneath cupboard shelves, or let ceiling lights flood the plants above the room dividers. Such lighting has a double effect, it enables the plants to flourish, and it gives a dramatic accent to the décor of the house.

Interesting combination of bookcase and lights for African
violets and begonias of several varieties]

Artificial lighting is a help even for the casual grower--one who has only a few plants, whether by happenstance, for the fun of it, or simply because “a house is not a home” without a plant or two. Table, desk, and floor lamps can be used to supplement the natural light from windows. Too often windows are shielded by trees or the house next door, or perhaps it is winter and there isn’t enough light to keep most plants in a thriving condition. Just turning on a lamp so that the rays fall on a plant can lengthen the hours of light enough to bring out bloom that might otherwise be impossible.

Tropical plants with controlled light, heat, and moisture make a
“jungle garden”]

Miniature plants and gardens are, of course, shining prospects for growth under artificial light. They take so little space, and since there is a limit to the height, width, and depth a single installation will illuminate, you can make the most use of it if you are growing the little fellows.

Here’s how the “jungle garden” came to be our source of continual refreshment and pleasure. Our living and dining rooms, both rather small, are separated partially by deep shelves. The previous owners of the place, devout music-lovers, used the shelves for their hi-fi set and stacks of phonograph records. Our record player--pardon me, our stereophonic hi-fidelity music box--has its own cabinet, and that left a gap in the divider between the two rooms. We naturally thought of plants, particularly the tender tropical miniatures I collect. Since we still hope to do extensive remodeling, the garden was not built permanently into the shelves, but was constructed as a separate case.

We are fortunate in having a generous friend who loves to work with fine wood, and can make cabinets with the precision of the real professional. The case he turned out is a beauty. It measures eighteen inches by twenty-four inches inside. The top rests on strong metal rods at the corners. Window glass slides horizontally in the grooves cut in the top and bottom, enabling us to open or close the case as need be. The inside of the top is painted white, thus reflecting the light from the lamps downward on the plants. We use both fluorescent and incandescent lights which are mounted on the underside of the top. The bottom of the cabinet is lined with the heaviest plastic we could find.

At first the case was used as an indoor greenhouse for many potted plants that need protective warmth and humidity. Several inches of vermiculite in the plastic lining were kept moist constantly, with the sides being opened or closed for ventilation.

Later, we filled the bottom with rich potting soil and put the plants’ roots right in it--climbers, creepers, tiny bush-shapes and trees. This turned out to be more of a “jungle” than we expected. Some notably delicate residents seeded themselves and started families. A dainty cissus strung itself langorously from one end to the other. The creeping fig nearly strangled the frail, whiskery bertolonia. But the planting was a source of delightful surprises--a bud here, a flower there, increasing colonies of some delicacies we hadn’t been able to grow at all, before.

Several years ago a bookcase which I set up in my office as a garden was the object of considerable attention--how much I never realized until I dismantled it and gave away the plants. Then, I was bombarded with questions--and even some complaints that I had taken away this spot of greenery. From the night watchman up to the president of the company, people missed those plants. Some even thought I must have been fired.

There is a little house in Levittown, one which I always enjoyed visiting. The second floor has two finished rooms, one of which then was the office-den of the hard-working Elvin McDonald of _Flower and Garden_. (He has since moved to Kansas City.) His tiered plant table with fluorescent lights was there for a functional reason, but it had a decorative value as well. In other homes I’ve seen plants growing by hundreds under lights in unused bedrooms, single specimens displayed in shadow boxes with circular fluorescent tubes, decorative gardens thriving in all sorts of dark corners. With artificial lighting taking care of the space problem, just about anyone can grow plants.

The author’s New York office light-case planted with gesneriads,
begonias, and other plants]

However, before your enthusiasm flies too high, consider this sobering caution. Like anything else, artificial lighting works best only when it is properly planned and executed. Light must have the quality, intensity, and timing that plants need. Specific, accurate, up-to-date information is not always easy to find. Despite many fascinating discoveries and developments, this is still a relatively new horticultural principle, and there is still much more to be learned. Before he begins, the newcomer should locate the very latest and most reliable information; and the experienced grower should keep posted on the constantly changing rules. It has been my pleasant discovery that the big power-and-light companies, ever alert to develop new outlets for their product, are keenly aware of the possibilities of artificial-light plant propagation. Many of them are setting up departments to help horticulturalists. If you are puzzled, try your light company for information. It may take a few phone calls and letters, but eventually I know you will find some likeable chap wanting to help you.

Light shelves of medium height with begonias of many sizes and
varieties (note miniatures down front center)]

Although it is not necessary to become a botanist, I feel it is urgent to have a clear conception of how plants grow, and particularly how they use light. While we can’t all be electrical engineers, it is also helpful to have some basic facts about electric lights and how they relate to plant growth. But if it were possible, I think I’d consider writing the facts I have with invisible ink. Who knows but what today’s list of rules will be obsolete, and outmoded by new discoveries, before this book can be published?

_Botanical Principles_

For normal growth and flowering, plants must have light of the proper sort, intensity, and duration. Thus the leaves can perform their function of making starch, then sugar--the mysterious process called photosynthesis. Besides normal growth, plants require an extra supply of sugar and starch for producing flowers. True, plants need light, but they also need dark to convert food into energy and growth. And this means complete dark. It has been shown that if light falls on so much as a single leaf, the entire plant continues to operate as if it were day.

For normal growth and flowers, plants require a certain balance of the red and blue rays of the spectrum. In general terms, blue rays are especially effective in developing leaves, stems, and other vegetative growth, and often in greater proportions for seedlings as compared with mature plants. In general, the red rays keep plant growth sturdy, regulate the development of buds and flowers, affect the germination of seeds and the rooting of cuttings.

For normal growth and flowers, different sorts of plants need light of different intensities--depending usually on available light in their natural habitat. Again in a general sense, light of more intensity is needed for flowering as contrasted with the needs for healthy foliage. But light intensity requirements vary with various types of plants.

For normal growth, and flowers, some plants need dark periods of greater duration. This is the principle called photoperiodism. By now a good many plants have been classified as to this requirement, but there are many others whose needs are yet to be determined. Chrysanthemums, poinsettias, and Christmas cactus, for example, will set buds and flowers only when there are more hours of dark and fewer hours of light. These are called _long-night plants_. Tuberous begonias, and other summer-flowering types, come into flower when nights are of short duration, and are called _short-night plants_. Those plants that don’t seem to care one way or another are called _day-neutral_. For the sake of consistency you might even call them _night-neutral_. It is also thought that there is some relation between the duration of light and dark periods and temperature. Thus it can be seen how much research is yet to be done. A challenge of course, but that is what makes our scientists great.

_Electrical Principles_

Artificial light is not the same as daylight--it doesn’t have to be. It needs only to supply the right kind of light (blue and red rays) of suitable duration and intensity. Because it is constant, and consistent, the intensity (as measured in foot-candles) does not have to equal the brightness of a sunny day at high noon. Daylight waxes and wanes from dawn to dark every day, and may be very dim on cloudy and rainy days. Artificial light, coming from generators, is not dimmed by clouds or other external conditions. Duration is controlled by a light switch, or a time clock.

Incandescent bulbs are an adequate source of red rays for plants, but give little blue. They get burning hot, are comparatively expensive, and actually are inefficient to operate. Incandescents are also a source of far-red rays that delay flowering on long-night plants and operate in reverse for short-night plants. According to U. S. Department of Agriculture scientists, incandescent light used as a supplement to fluorescent light “improves the growth habits of many kinds of plants, but is seemingly not required by others.”

Until the introduction of the new Gro-Lux tubes in 1961, fluorescent lamps have given light with more blue than red, and in varying proportions according to the types of lamps. Fluorescent tubes do not get burning hot, and they are comparatively inexpensive to operate, and also efficient. In using the older types, those created especially for illumination, it is important to come as close as possible to the proper balance of the red and blue rays needed by plants. For some plants it has been sufficient to use only fluorescent tubes. For some of the other types many growers use 10 per cent of the wattage in incandescent bulbs.

But the new Gro-Lux fluorescent tubes, developed by Sylvania Electric Products, Inc., are especially for plants and not for illumination. They give a lavender-looking light made up of red and blue rays which are carefully balanced to suit plant needs. Growers who have used them report a spectacular improvement in plant appearance, in plant health, in faster rooting of cuttings, and in increased flowering. If demand warrants it, no doubt other electrical manufacturers will introduce their own brands of fluorescent tubes for plants.

Obviously, in growing plants under artificial light there are so many variable elements it is impossible--and extremely unwise--to set down hard-and-fast rules. The types of plants to be grown, whether the installation is primarily decorative or functional, and the possibility of continuing research outdating your work, all should be taken into consideration when any installation is set up and put into operation.

CONSTRUCTION AND INSTALLATION

Again, I must write in general terms. I have neither the knowledge nor the experience to explain the intricacies of wiring, ballasts, circuits, and the like. This technical information is available from your electrical supplier and from equipment manufacturers, and often is on the cartons in which the parts are packed. Our installation was so outrageously large we had to hunt up a friendly contractor for help. He was a sympathetic man who loved plants and was fascinated by the idea of growing them under lights. Also, he was a cautious person, mindful of the fact that our electrical system was about twenty-five years old. And that stamped it as being an antique (as your light-and-power men will tell you). Since our basement floor was likely to be damp at times, heavy waterproof cables with special plugs and outlets were used, and grounded to prevent shocks, etc. Be careful about your electrical system, especially if you are going to go into anything as elaborate as our first enthusiasms. Don’t build a firetrap for yourself. It’s hard on the plants, not to mention the old homestead.

Whether your plants are to be grown in a garden, or in pots on benches, on shelves, or in a greenhouse-like case, the lineal proportions will be determined pretty much by the space that is available in your house, basement, greenhouse, or perhaps, as was in my case, your office. In small decorative planters twenty-five-watt fluorescent tubes (two feet long) are used most frequently. However, it is important to use enough of them, lined up closely to each other, to give a light of sufficient intensity. In fluorescent tubes the light is most intense in the middle and tapers off sharply at the ends. Since short tubes have more end--and less middle--they give off less light. The “shorties” are less efficient, as your plants will tell you.

Miniature roses, begonias, a birdbath, and ground cover made
this charming little formal garden.]

The distance between the tubes and your plants also affects intensity. The closer they are, the stronger the light. If possible, hang your fixtures on chains so that they can be raised or lowered. Adjust them to accommodate the taller plants and then raise your “little fellers” on upended pots, bricks, or boards so they will not be cheated of their share of light. Please remember, the greater the distance between light and plant, the more tubes you will need. Distance determines the number of tubes!

For greater intensity, and efficiency, forty-watt tubes (four feet long), or even larger, are usually recommended. If these are to be hung from the top of a case or cabinet, the simple strip fixtures are sufficient. If there is to be no “ceiling” directly above the lights, or if it is a decorative arrangement where glare might hurt the eyes of those who see it, use the industrial fixtures with shield-like reflectors. (In planning your light-garden, please don’t forget that the fixtures are a few inches longer than the actual tubes.)

If the case which you may be planning can be enclosed, at least on three sides, it will be easier to maintain the needed humidity. If the enclosing sides are opaque, they--and the “ceiling” above the lights--should be treated so the light rays are bounced back and the plants receive the extra benefit. In our cabinets we usually applied several coats of flat white paint on the inner surfaces. But once, under the blandishments of the aluminum industry, I lined a cabinet with their foil. It was plain foil, not the crinkled sort, so I did my own crinkling. Then I smoothed it out and fastened it in place with a staple gun. Plain foil, like high-gloss white enamel, seems to reflect the light every place except where it should be, on the plants.

In one of the installations we had at our place on Long Island I found it impossible to put in enough fluorescent tubes for the plants we wished to grow. Since they were day-neutral varieties, we made up for the lack of intensity by increasing the length of time the lights were used. Up to a point, increasing the light-hours will help to compensate for the lack of intensity--just to a point, however, and then the old law of diminishing returns takes over. Plants must not be under light so long that they fail to get their necessary periods of darkness. It is as essential as sleep is to a human being--perhaps more so.

OPERATION

In planning a light installation try to squeeze out a few extra dollars for an automatic timer. It will help to guarantee success for the operation. You’ll have a certain peace of mind if you tend to be absent-minded. No more will you fret through a P.T.A. meeting, a movie, or a concert wondering if you turned off the lights on your plants. The timer will have done it for you. If you happen to have an enclosed case--one tight enough to conserve the humidity--you can very easily go away on a short trip (a day or two at most) and feel confident your pets will not suffer. If you have postponed buying a timer--actually, they are not expensive--and have to leave your plants for a day or so, it is better to turn off the lights completely. They’ll suffer less than if the lights are going full blast. But for peace of mind, particularly that of the plants, we’ve always used automatic timers. At one time we had three of them. When I was ordering one from a mail-order company, my husband was buying me one as a birthday gift. And at the very same time the electrical contractor who redid out light system donated one in the interests of our begonias. We had them popping on and off at all hours of the day and night. We even hooked a percolator into one for the morning coffee.

As I look back over our experiments of a few years ago, I find there are more plants which are day-neutral (night-neutral if you prefer) than plants which are short-night or long-night. For these day-neutrals, fourteen to sixteen hours of fluorescent light (of sufficient intensity) every day, all year round, will keep them happy and thriving. They won’t know the difference between winter and summer, spring and autumn, Florida or Long Island. That has been our experience, but now I find opinions vary on whether hours of light should be lengthened or shortened in spring and autumn for these seasonal changes. (There is still plenty of room for experimentation. For instance, the light requirements for many plants are still to be worked out--even for closely related plants within various types.)

Some growers, those who specialize in plants for which they know the light requirements, turn on the lights at dawn and turn them off at nightfall. This is a year-around schedule. Others who have plants of assorted types, or of undetermined light requirements, maintain a constant fourteen-hour growing day. And they are often surprised by even second, or third, bursts of bloom. A nice surprise, if you ask me.

INTENSITY

Here again we find the needs of plants vary and fluorescent-light setups vary accordingly. If possible, measure the light in your growing area. The readings of a photographic light meter--the same instrument you employ in your photography--can be translated into foot-candles. Or you can get a meter that registers foot-candles. For advice, consult your camera dealer, or check with your local power-and-light company. Here in Redding we find the Connecticut Power and Light Company vitally interested in artificial-light plant propagation.

Again “in general,” house plants that require “full sun” when grown in a window need 1200 to 1500 foot-candles of artificial light, and for fourteen hours a day. Foliage plants will get by with 500 to 600 foot-candles. At about 1000 to 1200 foot-candles many plants, and I’m thinking of begonias and gesneriads in particular, will be robust and floriferous.

Should you find it difficult to figure light intensity as suggested above, you might follow the formula worked out by an old friend on Long Island, Elaine Cherry (Mrs. Norman Cherry, the wife of one of our engineering friends). Her formula is easy to follow. “A single forty-watt tube will serve a space approximately four feet long by six inches wide.” Small plants that need intense light can be set up close to the tubes.

Here is a tip--ever notice how your television picture is dim but brightens appreciably when you take a dust rag to the surface of the glass? The same is true of your light fixtures. Wipe them off now and then. Clean tubes give more light than dusty ones, and new tubes give more light than old ones. When a tube darkens at the ends, that means it has seen better days and should be replaced. According to Mrs. Cherry, it is a good policy to replace tubes after five thousand hours of service and not wait for the dwindling light to curtail the rays your plants need. While you are at it, it’s smart to insert new starters.

TYPES OF TUBES

Until the introduction of the Gro-Lux lamps, we had to choose types designed primarily for illumination. And there were as many choices and combinations as there were tube types. In a private and somewhat limited survey, I’ve found that when only one type of tube was used, cool white was to be preferred. In combinations of equal or two-to-one proportions, some growers use daylight and natural tubes; others prefer daylight and de-luxe warm white. And there are those who go for cool white and de-luxe warm white. Those who supplement their lights with 10 per cent incandescent light seem to favor all daylight fluorescent tubes.

The object of all these different combinations is to get the most favorable balance of red and blue rays. If you are a hobbyist who grows plants for the love of them, and not necessarily for their value in interior decoration, the new Gro-Lux tubes are less complex and less troublesome. You don’t have to be a light expert to get results and have fun with your light-garden.

CARE OF PLANTS

Temperature, humidity, soil, fertilizing, potting--almost without exception, plants growing under artificial light need the same care as window-garden plants. But since the light is an artificial substitute for natural sun and light, watch for signs that the plants are not entirely satisfied with it. When they stretch out, get long and lanky, or the foliage has a weak, wan color, set the plant up closer to the tubes, or over toward the center where the light is strongest. You might do well to make room by shifting some of the plants that have been in the center. Sometimes when a plant has too much light it will become stunted. Until a more exact rule book is written, you will have to use your own good common sense.

Here is the big worry many growers have; the failure of their pets to flower. More often than not that means insufficient light, insufficient red light, or perhaps both.

As of this date it is probably ten years since we first started toying with plants under artificial lights. I say “toying” because it was just that--purely for fun. We kept no records. When frost was in the air we dug up flowers and brought them indoors. My husband even brought in eleven goldfish which he feared would be glacéed in an outdoor pool. We put everything under lights with the fish in terrariums. Eventually he spent thirty dollars for a pool in an untidy corner of the living room. Thirty dollars, not counting the electric bill, I felt was a little expensive for a dollar’s worth of goldfish. I sold twenty dollars worth of photographs of that pool and then included one of them in my book _All About Vines and Hanging Plants_. Eventually he allowed me, very grudgingly, to place episcias around the pool. Mites moved in on them. He sprayed for the mites and killed all of the fish. He replaced the fish with eleven others. Thus the cycle continued.

All the time we had those indoor plantings our neighbors kept asking us what plants were good for lights and what lights were good for plants. Frankly, we couldn’t answer. Ten years ago that book hadn’t been written.

We tried just about everything less than five feet tall. We had wonderful results with African violets, begonias, orchids, and gesneriads. We even had a morning glory which singed itself on a steam pipe. All of them loved the kilowatts.

(_In Chapter 6 I have indicated certain plants which are suitable for propagation under artificial lights._)

_CHAPTER 3_

MINIATURE GARDENS IN CONTAINERS

DECORATIVE CONTAINERS, DISH GARDENS, AND MODEL LANDSCAPES

House plants are usually considered more or less lasting indoor decorations. But they can also be used the same as cut flowers for temporary and changeable displays, and then, like cut flowers, can be discarded when they begin to fade. They cost less and last much longer than bouquets, but because they’re temporary decorations, they cause less worry and require less care than the permanent inhabitants of window sills or artificially lighted gardens.

That sounds rather heartless, I know. But it’s a defense I’ve built up--and a perfectly logical one--against the wails of those who take beautiful florists’ plants, place them on dark mantels, or in other thoroughly unsuitable growing areas, neglect them wholeheartedly, and then “can’t make them grow.” How many people do you know who buy lovely Christmas begonias, poinsettias, or cyclamen for the holidays and expect them to bloom the following season?

Honestly, I can’t see any reason why plants must be immortal, why they can’t refresh and beautify the home as long as they remain healthy and attractive, and not one minute longer, and then be discarded. I do object to stringy, leafless stems of expiring philodendron, dried-up dish gardens, or any plant or combination of plants that has become undecorative because it is dying. Actually, some florists’ plants, such as greenhouse primulas and calceolarias, are annuals that come into full bloom only once, and having had their big moment are supposed to die peacefully afterward.

Do I treat my plants in the house so very cruelly? Well, no ... not exactly. My budget includes no allotment for florists’ fripperies. I have a different system, and I have a constant supply of healthy plants to use for indoor decoration. My plants spend most of their lives in growing quarters where cultural conditions are good--in bright windows, in the window greenhouse, or on our small sun porch. They are brought in for a few days (never more than a week), then quickly returned to their more healthy, healthful homes. Having done their duty, they go back to grow and prosper. I do this with single potted plants, placed in attractive containers, with dish gardens, model landscapes, and combinations of plants. They are beautiful and charming as table centerpieces, mantel ornaments, displays for the coffee table, shadow box, or bookcase shelf.

PLANT-AND-CONTAINER COMPOSITIONS

In the past few years my preoccupation with miniature plants has led to some pleasurable rummaging and shopping for containers in which to place them to make compositions for a bedside or telephone table, for the narrow window sill above the kitchen sink, and for the small bric-a-brac shelf in the foyer.

As any flower-arrangement artist knows, small-scale compositions are often more intricate and more difficult than full-scale affairs--every detail is subject to separate scrutiny. However, patience, good taste, and an artistic flair will unite a plant and a container with an affinity that looks casual, even accidental, but actually is cunningly contrived. Container and plant become one picture--neither outshining the other--the container setting off the plant, and not sacrificing its own importance.

People who are intrigued with these miniature compositions usually collect containers in wide variety. Some of them are even made for the express purpose of holding plants--from wood, bronze, copper, all sorts of chinaware, glass, and ceramics. But the containers that give the most fun are those made for entirely different purposes. I’ve seen tiny bird cages, little woven baskets, glass lamp shades, odd-ball ash trays, punch cups, unusual tea or coffee cups, soup tureens, and even an ancient Buick hub cap which a little girl “borrowed” from her father’s collection of automobile antiquities. Some gourds are just the right size and shape, and with a nice wartiness, to lend enchantment for growing plants. Our cat keeps us well supplied with the tins in which his food is sold--spray them with paint and they are ideal for many plants. Some cocktail or champagne crystal looks precious with miniature vines drooping over the side.

Once for our P.T.A. fair I collected a dozen or so unmatched liquor glasses, put a half-inch of soil in the bottoms, and planted tiny _Sinningia pusilla_. They sold immediately, with people wanting more. A plant sale at such an affair is a rather convincing test of popularity, and whether you have created a good arrangement.