Fig trees, a member of the ficus species, are subtropical trees that thrive in warm, dry climates and high-desert regions. Fig trees thrive in well-drained soils, as their roots do not tolerate being waterlogged. These hardy trees do not handle frequent cold temperatures, but they are well-suited to dry areas that do not receive a lot of natural rainfall. Figs have a series of shallow roots, but proper irrigation encourages them to put down deeper roots, ensuring they grow into healthy, drought-tolerant trees.
Water newly planted trees once weekly. Water at the base of the tree, wetting the soil to a 15-inch depth at each irrigation.
In desert conditions or sandy soils moisture drains away from the roots more quickly, so water young these trees twice weekly.
Water mature trees every two weeks, wetting the soil to a 15-inch depth. During periods of frequent rainfall, irrigation is unnecessary if the soil remains moist.
Apply a 2- to 4-inch layer of mulch on the ground around the tree, as mulch helps preserve moisture in the soil. Spread the mulch under the entire canopy of the tree. Leave a 2-inch space between the mulch and the fig tree's trunk, otherwise pests may nest in the mulch and chew on the bark, damaging the tree.