The successive plantings may be in the same bed among those set earlier, or they may be grouped in unoccupied nooks, or portions of the border. The plants may stand as close as 6 inches from each other. The earlier planting may be a foot apart to admit of later settings between.
Late in the fall, after frosts and before freezing, the corms are to be dug, cleaned, and dried in the sun and air for a few hours and then stored away in boxes about 2-1/2 inches deep in a cool, dark, and dry place. The tops should be left on, at least till completely shriveled. The varieties are perpetuated and multiplied by the little corms that appear about the base of the large new corm which is formed each year. These small corms may be taken off in the spring and sown thickly in drills. Many of them will make flowering plants by the second season. They are treated like the large corms, in the fall.
Gladioli are easily grown from seed also, but this method cannot be depended on to perpetuate desirable varieties, which can be reproduced only by the cormels. Some of the best flowers may be cross-pollinated, or allowed to form seed in the usual manner; the seed sown thickly in drills, and shaded till the plantlets appear, then carefully cultivated, will afford a crop of small corms in the fall. These may be stored for the winter, like the other young corms, and, like them, many will flower the second season, affording a great variety and quite likely some new and striking kinds. Those that do not flower should be reserved for further trial. They often prove finer than those first to flower.
Early-flowering varieties of gladioli may be forced for late winter or spring bloom.
For bouquets, cut the spike when the lower flowers open; keep in fresh water, cut off the end of the stem frequently, and the other flowers will expand.
Gloxinia.—Choice greenhouse tuberous-rooted, spring and summer-blooming perennials, sometimes seen in window-gardens, but really not adapted to them, although some skillful house-gardeners grow them successfully.
Gloxinias must have a uniform moist and warm atmosphere and protection from the sun. They will not stand abuse or varying conditions. Propagated often by leaf-cuttings, which should give flowering plants in one year. From the leaf, inserted half its length in the soil (or sometimes only the petiole inserted) a tuber arises. This tuber, after resting until midwinter or later, is planted, and flowering plants soon arise.
Gloxinias also grow readily from seeds, which may be germinated in a temperature of about 70°. Flowering plants may be had in August if seeds are sown in late winter, say in early February. This is the usual method. After the bloom is past, the tuber is partially dried off and kept dormant till the following season. It will usually show signs of activity in February or March, when it may be shaken out of the old earth and a little water may then be applied and the amount increased till the plant is in bloom. The same tubers may be bloomed several times.
Success in the growing of gloxinias is largely a matter of proper watering. Keep the dormant tuber just dry enough to prevent shriveling, never trying to force it ahead of its time. Avoid wetting the leaves. Protect from direct sunlight. Protect from draughts on the plants.
Grevillea.—The “she oak,” very graceful greenhouse plant, suitable also for house culture. The plants grow freely from seed, and until they become too large are as decorative as ferns. Grevilleas are really trees, and are valuable in greenhouses and rooms only in their young state. They withstand much abuse. They are now very popular as jardinière subjects. Seeds sown in spring will give handsome plants by the next winter. Discard the plants as soon as they become ragged.