Tornado-Damaged Post Oak with Hollow Trunk: Can It Be Saved?

Assessing a Split, Decayed Post Oak

A large double-trunk post oak lost one trunk in a 2008 tornado; the fallen trunk was hollow. The remaining trunk shows extensive decay. The owner wants to know how to save it.

Expert Opinion

• With advanced decay in the main trunk, the remaining crown is at high risk of failure in future storms.
• No treatment reverses decay. Smooth jagged wounds to aid natural compartmentalization.
• Fertilize with 10-10-10 at 1 lb per inch of trunk diameter (now and fall) to boost vigor.
• Consult a state forester or certified arborist for a structural assessment—pruning or removal may be needed.

Safety first: a hollow, decayed oak near a cabin is a hazard.