An annual plant completes its life cycle in just one season, from seed to flower to producing seeds, all before frost kills the plant. Some annuals are pretty when used as a low hedge or border around other plants. Annual flowers also are wonderful companions to perennial plants, especially perennail gardens which have been recently planted and may not bloom the same season. Plant around mailboxes, in an old tire, or in a wheelbarrow.
Annuals are wonderful in large containers, too, and in hanging baskets.
Shown above is the Easy Gold Garden, a colorful annual flower garden from seed. Combine with spring-flowering bulbs, summer flowering bulbs, perennial plants, blooming shrubs. They're also great combined with a lot of other annual flowers. Your Garden Sketch the area on graph paper. Put groups of similar plants together for pleasing color effect from a distance.