Cottonwood Mid-Summer Leaf Drop: Drought Response

Mature cottonwood in Albuquerque, NM dropping yellow leaves in mid-July. Owner concerned (expects fall drop).

Cause: Water Stress

Lack of water triggers false autumn shutdown — tree aborts leaves.

Water 1 inch every 3 days until rain returns (pan/sprinkler method).

Trees: Mulberry Partial Leaf Out: Fungus Check and Atomic Grow Catch-Up; Cottonwood Leaf Rust: Same Disease, Same Advice; Sycamore Leaf Drop in Extreme Drought: Watering Strategy; Caragana Yellow Leaves: Overwatering Diagnosis; Cottonwood Leaf Drop: Aphids, Borers, or Rust?; Transplanted Weeping Cherry in Heat: Water by Inches, Not Minutes; Burlap Left on Weeping Cherry Root Ball: Replant Immediately; Avocado Tree from Pit: Transition from Water to Soil; Rubber Tree Leaf Drop Indoors; Yellowing Leaves on Newly Planted Hydrangea Tree

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