For example, reflected light from structures facing the area of most sun creates high temperatures and increases the loss of water from nearby plantings. Shade trees and ground covers stategically planted in these exposures reduce temperatures in the warm, dry season, yet allow sunlight to enter during the months of high rainfall. The following are guidelines for the creation of three Xeriscape microclimates. Each zone is based upon the amount of water applied. This is the lowest water zone in a Xeriscape, providing the greatest savings relative to traditional landscapes.
Irrigation is needed during the establishment of new plantings.
Once established, the plants in this zone require little, if any, additional water. Plants in the low water zone need to be selected carefully for minimal water use. Low Water Zone Plants growing in this zone require more water than is available from natural rainfall. Take advantage of run-off from downspouts, driveways, and patios to provide this water. During very dry periods, small amounts of supplemental irrigation may be necessary.