Psilocybin grow bags are containers made of plastic that are filled with substrate, a mixture of organic materials that provides nutrients for the mushroom mycelium to grow in. The mycelium colonizes the substrate and eventually produces mushrooms that can be harvested. A grow bag is a convenient and easy-to-use tool for culturing magic mushrooms, but it’s important to understand how they work before using one.
A grow bag is autoclavable, meaning that it can withstand high temperatures during sterilization. This is a good thing, as the hot air from the sterilizer would quickly melt a standard bag that wasn’t specifically designed to withstand this heat. The gussets, or folds, of the bag are another feature that make it autoclavable. This design allows the cultivator to slip a filter in between the gussets to block contaminants during sterilization. This filter also allows for ample air exchange during the cool down process after sterilization.
Once the grow bag is sterilized it can be injected with spores and culture. This is best done in a still air box or a flow hood, but can be done in any clean space that is free of contaminants and light. After injection the bag is placed in a dark room where it can colonize and begin fruiting within about 2-3 weeks.
These particular grow bags are designed to be user-friendly and are a great option for beginner cultivators. They come with a self-healing injection port for use with a spore syringe and 2.5lbs of hydrated and sterilized grain and 2.5lbs of coir+vermiculite+gypsum substrate.