Emerald Arborvitae Bronzing in New Jersey: Heat and Transplant Shock

20 newly planted (August) emerald arborvitae in Hammonton, NJ turned orangy from inside out after hot planting period with daily (sometimes 2×) watering.

Diagnosis

Environmental stress, not disease. Causes:

• Heat/drought at planting.
• Transplant shock.
• Possible overwatering (daily in clay?)

Management

1. Water deeply but infrequently—check soil first.
2. Do not fertilize now (fall).
3. Monitor for bagworms (hand-pick).
4. Assess in spring for new green growth.

Soil Note

Clay holds water; daily watering may have caused root hypoxia. Let soil dry between waterings.