Quick Answer
Treated wood is generally not recommended for mushroom cultivation due to the chemicals used in the treatment process which can be toxic to the mycelium and potentially harm humans consuming the mushrooms grown on it.
Chemical Contamination Risks
Treated wood often contains preservatives like arsenic, chromium, and copper, which can leach into the surrounding environment and contaminate the mushroom mycelium. These chemicals can also be absorbed by the mushrooms themselves, potentially causing harm to humans who consume them. It’s essential to avoid using treated wood to minimize the risk of contamination and ensure a safe and healthy mushroom cultivation environment.
Alternative Log Options
For mushroom cultivation, it’s best to use untreated, naturally rot-resistant woods like cedar, cypress, or redwood. These types of wood provide a safe and healthy environment for mycelium growth and can be easily sourced from local suppliers. When selecting logs, look for those with minimal knots and a diameter of 8-12 inches, as these will provide better aeration and moisture control for the mycelium.
Log Preparation Techniques
To prepare logs for mushroom cultivation, drill 2-3 inch deep holes at 6-8 inch intervals along the length of the log, using a 7/16 inch drill bit. Then, insert a mushroom plug into each hole, making sure it’s seated snugly. Finally, seal the holes with a small amount of wax or beeswax to prevent moisture loss and promote consistent mycelium growth.
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