Plant or animal? (Or: Don't try this at home!) Darwin Correspondence Project garden bed with artichoke plants in garden in Lombardy in winter season Stock Photo Alamy Eric's Stained Glass Conservatory Fine Gardening Annuals Vs perennials: Do you know the difference? Annuals complete their life cycle in one season, blooming in spring and withering by autumn (like petunias or marigolds). Perennials return each