Crimson Maple Trunk Crack: Fertilize and Protect from Borers

Maple Trunk Crack After Winter: Healing Naturally

A frost crack on a young Crimson maple is healing—callus tissue is forming at the edges. This is good.

Support Recovery

1. Fertilize: 10-10-10 at 1 lb/inch trunk diameter. Scatter, water in (or before rain). Boosts growth and callus formation.
2. Protect from borers: Apply Bayer Advanced Tree & Shrub Insect Control (imidacloprid) as soil drench. Prevents borers from entering exposed wood.
3. No wound paint/sealant. Slows healing.

Why Maples Crack

Thin bark + rapid temperature changes (sunny days, freezing nights) = frost cracks. Young maples are especially prone.

Monitor

Callus will close the wound over several years. Keep tree vigorous.