Saving an Ash Tree After Construction Root Damage

Understanding the Stress Response

Cutting major roots for a foundation reduces water/nutrient uptake capacity. The tree compensates by shedding leaves (reducing transpiration) and overproducing seeds (stress reproduction). Droopy, curling leaves signal hydraulic failure.

Recovery Plan

1. Deep water weekly: 1 inch via pan test to maximize remaining root function.
2. Fertilize now and fall/spring: 10-10-10 at 1 lb per inch trunk diameter, broadcast under canopy, watered in.
3. Mulch 3 inches to conserve moisture and protect surface roots.

Long-Term Monitoring

Expect reduced growth for 2-3 years. Watch for borers (spray Merit if sawdust appears) and avoid further root disturbance. The tree can survive if the crown remains mostly intact.