How to Keep Trees Healthy Through a SoCal Drought

During a Southern California drought, lawns may be the obvious casualty — but your trees are the bigger loss if they die. Mature trees take decades to replace and provide irreplaceable shade and value. Here's how to keep them healthy when water is scarce.

Prioritize trees over lawn

If you must cut back watering, protect your trees first. A brown lawn recovers in a season; a dead tree is gone for good. During water restrictions, direct your limited watering to keeping trees alive.

Water deeply and infrequently

Trees need deep watering that soaks the root zone, applied slowly at the drip line (the edge of the canopy) rather than at the trunk. A long, slow soak every couple of weeks does far more good than frequent shallow watering. A soaker hose or slow-drip method works well.

Mulch is critical in drought

A thick (3-inch) layer of mulch over the root zone — kept back from the trunk — dramatically reduces evaporation and keeps roots cooler. In drought conditions, mulching is one of the most valuable things you can do for tree survival.

Recognize drought stress

Wilting, curling, or scorched leaf edges.
Early fall color or premature leaf drop.
Sparse canopy and dieback in the upper branches.

Catching stress early lets you respond before lasting damage occurs.

Reduce other stresses

Avoid heavy pruning, fertilizing, or construction near trees during drought — all add stress. Keep them as healthy as possible so they can ride out the dry period. For valuable trees showing decline, an arborist can help. See our tree services.

Frequently asked questions

How do I water a tree during water restrictions?

Use a slow, deep soak at the drip line every couple of weeks — far more efficient than frequent shallow watering — and mulch heavily.

Can a drought-stressed tree recover?

Often yes, if caught early and given deep watering and mulch. Severely declined trees may not, so act at the first signs.

Arbol Roble has cared for Inland Empire landscapes since 1997, serving Rancho Cucamonga, Ontario, Fontana, Eastvale, Corona and Riverside. Request a free quote or browse our residential and commercial services.