A perennial is a plant that comes back year after year. Usually, the top portion of the plant will die back and then come back the following year. Some perennials don’t die at all and some even stay green all year long. Perennials give gardeners a better structure to work with when designing and planting the garden because they will grow in the same spot from the same roots year after year. Their roots grow deeper and spread out and need more care than annuals because the garden bed needs to be prepared properly before planting, they need more fertilizer, and they need more pruning than annuals.
Some good perennials for the desert (plant hardiness zone 9A):