All plants included in this website are low-water-use plants, but some get by with less water than others. Each plant has been designated as having very low, low or moderate water requirements. For example, a palo verde tree requires less water than an evergreen elm tree. Keep in mind that even low-water-use plants will require regular irrigation after they are first planted. For more information on irrigation and water needs of plants, refer to the booklet Landscape Watering by the Numbers: A Guide for the Arizona Desert, available from your city water conservation office.
NOTE: If a plant will tolerate a range of exposures or accept a range of water use, it will have more than one designation.