First of all, you have to water your plants and lawn early in the morning, maybe between 4 and 8 a.m. for avoiding the evaporation loss. Make sure using deep watering methods. This consists in slow applications of water during longer periods of time.
So, this allows the roots of your trees and plants become saturated of water. Remember that the amount of water you need depends on the kind of tree you are taking care of. For your palm trees the approximate measure is around 3 feet deep or if you have shrubs around 1 feet deep of wet soil. We recommend you to use a soil probe to determine the depth of water penetration. When summer hits in its warmer days you should water yout trees twice a day.