The Top 3 Rules for Tree Care. 1. Water 2. Water 3. Water When watering established trees, provide a deep, soaking irrigation to the entire.
Water established trees and shrubs with overhead sprinklers. Apply a deep watering over the entire root zone area until the top 6 to 9 inches of soil are moist.
Find some tips on the best way to water your tree. In times of drought, when it hasn't rained for a month or more, even large, mature trees will need watering.