Mycelial Overlay / Stroma
Growing conditionsLow urgency
A thick, fuzzy, sometimes lumpy mat of mycelium that keeps growing but won't form pins.
Likely causes
- Too much moisture with high CO2
- Not enough fresh air or light at pinning
What to do
Introduce more fresh air and indirect light, and drop the temperature slightly to push it into fruiting.
Easily confused with
Not sure?
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This entry is general growing guidance compiled from extension and trade practice; it has no single citation yet. Treat it as a starting point.
Last updated: 2026-10-19