Maple Trunk Mushrooms: Internal Decay Indicates Hollow Tree

Serious Diagnosis

Raymond's maple: bark loss at base, mushroom-like growths at base and higher on trunk, woodpecker holes. Wood under bark appears sound.

Critical Finding

Mushrooms/fungal conks on trunk = fruiting bodies of internal decay fungus = tree is likely hollow. This indicates advanced heart rot/decay.

Management for Declining Urban Maples

Watering

• Thorough soaking every 1-2 weeks during dry periods
• Slow hose stream, move periodically
• Soak entire root zone to 6+ inches depth

Fertilization

• Complete fertilizer (13-13-13) spring and/or late fall
• 2-4 lbs per inch trunk diameter
• Broadcast over root zone
• Higher rates may burn nearby turf

Pruning

• Remove dead branches
• Early spring (pre-budbreak) for best wound healing
• May stimulate vigorous shoot growth

Root Protection

• Reduce salt-laden spring runoff over roots
• Mulch root zone
• Avoid soil compaction

Realistic Outlook

These measures support remaining vitality but cannot reverse internal decay. Tree structural integrity compromised. Monitor for safety hazards. Consider replacement planning.