Maple Tree Leaking Water: Slime Flux (Wetwood) Explained

Two 60+ year old maples show wet trunks and water running down bark days after rain. This is slime flux (wetwood)—bacterial fermentation in heartwood or sapwood creates gas pressure (up to 60 psi), forcing nutrient-rich liquid out through wounds. It attracts insects but rarely kills the tree. No reliable cure. Disinfect area with 10% bleach solution to deter insects. Avoid stress: water during drought, don't over-fertilize. The tree can live decades with this condition.

Management

• Surface disinfect with 1:9 bleach:water.
• Water deeply during dry periods.
• No fertilizer unless soil test indicates need.