An excellent mushroom growing bag suitable for professional and hobby growers. The 1 kg to 2.5 kg capacity is perfectly suited to sterilising grain spawn but it can equally be used for other sterilised and unsterilised substrates such as: sawdust/woodchip, straw, spent coffee grounds, and practically any other material used in mushroom growing.
The bag provides the perfect air-exchange for mycelium to grow quickly and evenly, making it much more effective than using DIY bags. We have used many different types of spawn bags and these are the best by far.
The filter strips act like mini HEPA filters and provide a carefully balanced gas exchange rate without drying out the substrate or spawn, whilst remaining a firm barrier against microorganisms and retaining excellent physical strength when autoclaved. These bags can be autoclaved sealed as long as the air is purged from the bag prior to sterilisation.