Medium Black Mushroom Grow Bags

Grow Gourmet Mushrooms at Home – Medium Black Mushroom Grow Bags

Start your mushroom growing journey with these premium-quality medium size black mushroom grow bags, trusted by commercial cultivators and home growers alike. 

Constructed from 0.08mm polypropylene—30% thicker than the standard 0.06mm used by many competitors—these mushroom grow bags offer superior tensile strength and heat resistance. Fully compatible with autoclaves and pressure cookers, they withstand the sterilisation cycle without compromising structural integrity, making them ideal for high-performance substrate preparation.

Each mushroom grow bag includes a 0.2-micron filter patch (38mm x 38mm) to ensure clean airflow while keeping out contaminants—supporting strong, healthy mycelium growth.

✅ Mushroom Grow Bag dimensions: 200mm x 120mm x 500mm (slightly larger than the Unicorn 3T for more substrate volume)

✅ Reliable filtration: 0.2μm filter patch for optimal gas exchange

✅ High-temperature resistant: Suitable for autoclaving and pressure sterilisation

✅ Less pinning in bag: Black bags are preferred by growers to reduce side pinning and encourage mushrooms to fruit at the opening

✅ Versatile pack sizes: Choose from 10, 25, 50, or 100 bags

Perfect for growing oyster, lion’s mane, shiitake, and other gourmet mushrooms.  Ideal for hobbyists, educators, and commercial growers looking for professional-grade results.

Black is our favourite as it is especially effective in reducing side pinning though can be more challenging to check for containments. Hint, run a clear bag in each batch for checking production quality.  Smelling the blocks when opening for fruiting is another good indicator of any issues.