Fruitless Mulberry Slow Decline: Internal Decay Suspected

East Contra Costa County, CA: fruitless mulberries dying slowly over years (smaller/fewer leaves, early drop). One dead, another starting. Sandy soil, hard water, drip irrigation, understory plants.

Findings

• Trunk cracks (1 cm deep) and lifting bark near base.
• Pin holes in old pruning cuts.
• No root disturbance.

Diagnosis

Low-level internal decay (fungal heart rot) entering through cracks/pruning wounds. Progressive, irreversible.

Next Steps

1. Photo of whole tree (upper 50–75%) for canopy assessment.
2. Monitor spring leaf-out: thinning = advanced decay.
3. Consider removal if near structures.
4. No treatment stops internal decay.