Established trees and shrubs in the landscape should be drought tolerant on their own, except during extremely dry periods. If you notice any wilting or the tips of any plants start to turn brown, they need more water. Try to follow the same approach as shown above, that is providing about an inch of water per week to the trees and shrubs. Early morning watering is best.
-Any tree or shrub planted less that 12 months ago will be more susceptible to dry conditions and should be monitored for drought stress. These plants will need more water than the more established plant material. Try to give them at least an inch of water a week, spread out between 2 or 3 watering cycles.