Annuals

Annual flowers complete their life cycle vegetative plant, bloom, setting seed, to death of the plant in one growing season. Most annuals need to be replanted each year, but others easily re-sow themselves. Their seed is scattered by wind, weather and wildlife, to pop up the next season when conditions are favorable. These unexpected visitors are called volunteers and can be a delight or a source of frustration, depending on your outlook and how rigidly you follow the garden's original design...

Perennials

Perennial plants live more than two years and, once established, bloom each year. Some die back to the ground in their off-season others retain foliage year around. In the low desert, perennial off-seasons are usually during the intense heat of summer and the colder winter months. You may notice that many plants that are considered perennials in other parts of the world are listed as annuals in the attached chart. That's because they don't receive enough winter coldness for dormancy or can't...