The amount of water that green wall plants need can vary greatly.  For this reason, we have developed specific irrigation recommendations based upon the plant type, wall orientation/ light intensity, maturity, and average daily temperatures.  How windy and exposed the site is may have an impact, but it is good to start with the recommendations outlined in the seasonal irrigation chart below and adjust accordingly.
Irrigation Chart:  Outdoor LiveWall with Standard Size Planters and Spray Irrigation