Bulb is a generic term for a range of different types of underground storage organ that include true bulbs, corms, and rhizomes. Within the bulb is just about everything the plant will need to sprout and flower at the appropriate time. Bulb flowers are among the most popular and best loved in the world.

Bulbs fall generally into two groups: spring-flowering (which are planted in the fall) and summer-flowering (which are planted in the spring). A more accurate grouping, however, divides bulbs into hardy and tender varieties. Most summer-flowering bulbs are tender bulbs. To enjoy these bulbs year after year, they must be dug up in fall and stored indoors over the winter (an exception is the lily). 

Popular bulb plants include tulips, crocuses, hyacinths, daffodils, dahlias, begonias and anemones.