Overwatering Causes Browning in Newly Planted Westmont Arborvitae

Daily watering in a hot desert climate is likely drowning your Westmont arborvitae. Overwatering produces the same symptoms as drought: interior browning while outer foliage stays green.

Correct Watering Regimen

Water deeply but infrequently: apply 1 inch of water (measure with a pan under the sprinkler) every third day unless it rains. This encourages deep root growth and prevents root rot.

Mulching and Planting Timing

• Apply 2–3 inches of organic mulch (pine straw works well) around the root zone, keeping it away from the trunk.
• Summer planting adds heat stress; extra care with watering and mulch is critical.

Adjusting irrigation should halt the browning and allow the trees to establish.