Lemon Tree Bark Loss: Internal Decay and Girdling Risk

Lemon Tree with Expanding Bark Loss: Serious Structural Decline

A lemon tree (Citrus limon) in Spain with a 4×6 inch bark patch that fell off, now expanding upward with new leaves/flowers attempting to grow, has internal decay with active compartmentalization.

What the Expanding Patch Means

• Original injury (mechanical, freeze, sun) → decay fungi entry.
• Decay spreading internally → bark separates (delaminates).
• Tree attempts callus roll at edges (visible in photo) — but decay outpaces it.
• Upward expansion = decay column tracking up trunk.

Prognosis

• Irreversible. Internal decay cannot be stopped.
• Tree may "hang on" months to years (compartmentalization).
• Structural weakness: trunk may snap at decay column in wind.
• Insects (ants, termites) will colonize dead wood.

Supportive Care Only

• Keep wound area dry (hard in rain).
• Water/fertilize to maximize vigor.
• No wound dressings—they trap moisture.
• Monitor for fruiting bodies (conks) = advanced decay.

Replacement Planning

Start a new lemon tree nearby now. Grafted on disease-resistant rootstock (e.g., 'Carrizo', 'C-35'). Remove old tree when it becomes hazardous or unproductive.

The tree's flowering is a stress response (terminal investment), not recovery. Plan for succession.