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Most of our annuals can be sown, if necessary, in the open ground.There are a few types, however, which must be started in seed beds,either in a greenhouse or in hot frames, in order to produce good bloombefore the frost injures the tops. These types include the China asters,cosmos, ten-weeks' stock, petunia, and butterfly flower, all of which re-quire a longer season for the period of maturing after seeding. Manytimes when the seeds of these plants are sown late, the plants reachtheir mature development and are on the point of producing flowerswhen they are suddenly injured by an early frost. It often becomes necessary or desirable to supplement plantings ofperennial or woody vines, which are naturally slow growing, withannual quick-growing vines to cover fences and lattice work. It isseldom that perennial vines can be planted and produce an adequatecovering for a lattice work or fence during the first year. The timerequired for the full development of such woody vines as the clematis,bitter-sweet, and rose is from two to three years. In such instances thecup and saucer vine, hop vine, cardinal vine, and the morning glorycan be planted to fill the bare areas during the first year or two. Manyof these annual vines have a heavy foliage, valuable for screen effects,and the writer has therefore divided this group into two sub-groups, in-dicating those with delicate foliage and those with heavy foliage. |
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