Water Oak Foamy Sap: Slime Flux (Wetwood)

4-year-old water oak in Memphis leaks foamy sap from a ¼″ hole at 5 ft, constant flow. Hot, dry period but well-watered. Owner asks cause.

Diagnosis: Slime Flux / Wetwood

Bacterial fermentation in heartwood produces gas pressure, forcing sap out. Common in oaks. Foul smell, attracts insects.

Prognosis

• Not a serious health threat if crown healthy.
• Flux may continue weeks/months, then stop.
• No cure; wound dressings worsen it.

Care

• Remove loose bark at site; let dry.
• Do not apply sealants.
• Maintain vigor (water, fertilize appropriately).

Tree should outgrow it.