If trees are to be irrigated, they should be given enough water to wet the soil at least 2 to 3 feet deep. The water should be applied in a doughnut-shaped pattern at the drip-line or outer edge of the tree’s branches. It generally takes about 2 inches of irrigation water or rain to soak 2 feet deep. Check the soil 6 to 8 inches deep just outside the drip-line of the trees monthly. If the soil is dry, then …