Weeping Cherry Sap Ooze and Trunk Split: Borer or Freeze Injury

3-4 yr dwarf weeping cherry: thick sap ooze from trunk last year; this year trunk splitting, ooze traveling up, spreading to other trees.

Analysis

• Sap = tree response to bark wound (often insect borer).
• Resin attempts to "drown" borer.
• Trunk split = physical stress or freeze injury.
• Spread to other trees suggests environmental (freeze) or mobile pest.

Management

• No magic fix.
• Good fertilization + correct watering may prolong life.
• Monitor canopy fullness yearly.
• Replace if severe.

Expert insight provided by Steve.