A perennial hardy in all zones, chives make a pretty addition to an ornamental garden. Each plant forms a clump of narrow, onion-flavored leaves up to 2 feet high. The rosy purple flowers are also edible. Plants are evergreen in mild climates but go dormant in colder areas. You can pot small divisions to grow indoors on a sunny windowsill. Chives are usually purchased as small plants, but they can also be started from seed. Space plants 1 to 1½ feet apart (or thin seedlings to this distance).