Large Mushroom Grow Bags

Large Bulk/Fruiting Substrate Mushroom Grow Bags

Start your mushroom growing journey with these premium-quality large 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 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 bag includes a 0.2-micron filter patch (45mm x 80mm) to ensure clean airflow while keeping out contaminants—supporting strong, healthy mycelium growth.

✅ Bag dimensions: 250mm x 140mm x 560mm (slightly larger than the Unicorn XLS for more substrate volume). 5KG recommended maximum weight with substrate and spawn.

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

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

✅ 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.