Although the making of window-gardens may not be properly a part of the planting and ornamenting of the home grounds, yet the appearance of the residence has a marked effect on the attractiveness or unattractiveness of the premises; and there is no better place than this in which to discuss the subject. Furthermore, window-gardening is closely associated with various forms of temporary plant protection about the residence (Fig. 268).
Window-gardens are of two types: the window-box and porch-box type, in which the plants are grown outside the window and which is a summer or warm-weather effort; the interior or true window-garden, made for the enjoyment of the family in its internal relations, and which is chiefly a winter or cold-weather effort.
The window-box for outside effect.
Handsomely finished boxes, ornamental tiling, and bracket work of wood and iron suitable for fitting out windows for the growing of plants, are on the market; but such, while desirable, are by no means necessary. A stout pine box of a length corresponding to the width of the window, about 10 inches wide and 6 deep, answers quite as well as a finer box, since it will likely be some distance above the street, and its sides, moreover, are soon covered by the vines. A zinc tray of a size to fit into the wooden box may be ordered of the tinsmith. It will tend to keep the soil from drying out so rapidly, but it is not a necessity. A few small holes in the bottom will provide for drainage; but with carefulness in watering these are not necessary, since the box by its exposed position will dry out readily during summer weather, unless the position is a shaded one. In the latter case provision for good drainage is always advisable.
Since there is more or less cramping of roots, it will be necessary to make the soil richer than would be required were the plants to grow in the garden. The most desirable soil is one that does not pack hard like clay, nor contract much when dry, but remains porous and springy. Such a soil is found in the potting earth used by florists, and it may be obtained from them at 50 cents to $1 a barrel. Often the nature of the soil will be such as to make it desirable to have at hand a barrel of sharp sand for mixing with it, to make it more porous and prevent baking. A good filling for a deep box is a layer of clinkers or other drainage in the bottom, a layer of pasture sod, a layer of old cow manure, and fill with fertile garden earth.
Some window-gardeners pot the plants and then set them in the window-box, filling the spaces between the pots with moist moss. Others plant them directly in the earth. The former method, as a general rule, is to be preferred in the winter window-garden; the latter in the summer.
The plants most valuable for outside boxes are those of drooping habit, such as lobelias, tropeolums, othonna, Kenilworth ivy, verbena (Fig. 269), sweet alyssum, and petunia. Such plants may occupy the front row, while back of them may be the erect-growing plants, as geraniums, heliotropes, begonias (Plate XX).
For shady situations the main dependence is on plants of graceful form or handsome foliage; while for the sunny window the selection may be of blooming plants. Of the plants mentioned below for these two positions, those marked with an asterisk * are of climbing habit, and may be trained up about the sides of the window.