Bulbs can lengthen the time a flower bed displays color.
Bulbs bloom before winter is over and are some of the last flowers to display in fall. The foliage of most bulbs is spiky, creating textural interest. During the growing season bulbs produce foliage and store up a reserve of food for the next year's flowering. Bulbs must store up energy during the growing season for continued vigorous growth and flowering. A true bulb consists of a modified underground stem surrounded by modified leaves which contain stored food for the plant.