The best way to water trees is slowly for a long time, so the roots have time to absorb the moisture from the soil as it soaks down. They spread out sideways and most are just a foot or so beneath the surface of the soil. They can last for decades when properly cared for, and they will reward you with ample shade. Depending on the type of tree, you may even get flowers or fruit! Knowing how to. trees provide many benefits like shade, clean air & increased property values. Learn how to care for your mature tree to keep it alive during the drought. easy way to water new trees use buckets or planters to water new trees. Deep watering slowly carries water 8-12 inches into the ground - instead of just wetting the surface. Why is this the best way to water trees? Deep root watering saves you time and money while creating healthier trees. When you water the grounds surface, much of the water evaporates before reaching the roots. Mature trees that are accustomed to regular lawn watering will continue to require some water during this time of drought. Check the moisture of the soil (6 - 8 inches down) around the trees dripline (area under the outermost leaves of the tree - see diagram). If the soil is dry and crumbly, apply water slowly so it seeps deeply into the soil. 00 question, and the answer depends on tree age, tree size, citrus species, climate and soil type. Research from the university of ari-zona has found that mature citrus trees use about 60 inches of water per year. There are many kinds of fruit trees and while there are some general rules you can apply to all, it is best to follow guidelines for your specific tree. However, no matter what kind of fruit tree you have, to make watering more efficient, add a couple inches of mulch. If you want your fruit tree to produce juicy fruits, you need to make sure it receives plenty of water. Most of the time, youll notice when fruit trees need extra water.