Care should be taken to lift all bulbs before freezing weather, as most varieties are tender. They should be harvested with the tops on, and laid away in a cool, dry place to ripen. The tops are then cut off and the bulbs stored in a dry place (fit for potatoes, but drier) until wanted the following spring. See _Bulbs_.
GLAUCIUM, or HORNED POPPY. The kind most cultivated (_G. luteum_) has bright yellow flowers in July and September. The flowers, contrasting with the deep cut glaucous leaves, make a fine effect in the mixed or ribbon border. Seed may be sown in the open ground where wanted. Thin to 12 inches apart. Height 12 to 20 inches. Perennial; but treated as a hardy annual.
GLOXINIA. Choice greenhouse tuberous-rooted perennials, sometimes seen in window gardens, but really not adapted to them. 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 a year if seeds are sown in late winter or early spring. This is the usual method. Soil should be porous and rich.
GODETIA. Very free-blooming annuals in fine colors, harmonizing well with the California poppy. Many of the varieties are beautifully blotched with contrasting colors. They are very satisfactory plants for solid beds or border lines, blooming from June to October. Seed may be sown in heat, and seedlings planted in open ground at a distance of 18 inches apart when danger of frost is over. A rather poor soil will cause them to bloom better than one very rich, as they are inclined to make a rank growth. Height 1 to 2 feet.
GOLDENROD (_Solidago_ of many species). The Goldenrod of the wayside is so familiar that the thought of bringing it into the garden is distasteful to many persons. But if given a suitable place in a well enriched border, no plant has greater possibilities. A large clump against a hedge of green, or massed behind a well grown plant of the blue-flowering wild asters, makes a striking contrast. They bloom late in the season, and the rich yellow and golden colors and the graceful forms are always pleasing.