Psilocybin Grow Bags

With mushroom legalization and decriminalization movements gaining momentum worldwide, many curious individuals want to try their hand at cultivating magic mushrooms. These bags make this process easy and convenient.

The bags are gusseted, meaning that they fold small and flat for sterilization but open up wide to hold a large block of sawdust for fruiting blocks. They also have a filter patch, which passes fresh air into the bag without passing contaminants.


The substrate used in these bags is a proprietary blend of sterilized organic manure-based compost, rye grain, vermiculite, gypsum, coco coir and more (we keep the exact ingredients secret). They’re also autoclavable (heat-resistant to 250PSI) for maximum contamination protection.

When you’re ready to inoculate your grow bag, simply use a spore syringe or liquid culture to inject the spores into the injection port and wait for it to colonize. Once the mycelium is fully colonized, you’re ready to begin fruiting.

To do this, you’ll need to cut a hole in the top of the bag for fresh air exchange. Be sure to open the bag often so that the mycelium doesn’t suffocate and die. When you’re done, the bag can be sliced open to harvest your mushrooms. These bags are designed for easy, beginner-friendly mushroom growing and can be reused. (However, it’s recommended that you sterilize them between each use to prevent contamination.) These bags have a 0.2 micron filter patch that blocks airborne contaminants and allows for proper airflow.

Injection Port

Autoclavable, gusseted, 3T injection port bags with a 0.2 micron filter patch. Each ShroomTek spawn bag features our proprietary blend of sterilized organic grain and substrate supplements (although we keep the exact formula a secret!) that are optimally hydrated for substrate mix and size to encourage faster colonization. Bags include a foam self-healing injection port specifically designed for inoculation with a spore or culture syringe.

Once you’ve injected your spores, simply place the bag somewhere dark and out of direct sunlight. Let it sit undisturbed for a couple weeks. When you see a bit of white mycelium start to form you can break up the harder block of colonized grain and mix it into the uncolonized, this will dramatically speed up the colonization process. Be sure to keep your hands clean and wipe the injection point and gas exchange port with alcohol before using (this is where bacteria will enter the bag). Once it’s fully colonized you’re ready to start growing!

Filter Patch

Autoclavable bags are a key component for a successful mushroom cultivation process. They’re crafted with a gusset to stand sturdy after they’re filled with substrate and feature a filter patch to allow for fresh air exchange while keeping contaminants out. The 0.2 micron filter is the size recommended for making grain spawn or fruiting blocks and allows for essential gas exchange, crucial in mushroom growth.

These bags are a good choice for use in any environment with similar climate conditions and can be used for both spawning and fruiting. They can be sealed with an impulse sealer or closed at the top with a cable tie before sterilization and are pre-sealed so they’re ready to inoculate.

If you’re planning on using these bags to make fruiting blocks it is best to add a tyvek filter between the gusset and substrate. This will prevent contamination during post-sterilization cool down as room air is naturally drawn into the bag.


Using mushroom grow bags is extremely simple and user-friendly. The bags are pre-sterilized and contain a carefully curated mixture of nutrient-rich materials that provide an optimal environment for growth. They also come inoculated with spores, liquid culture or mycelium on agar for quick and easy cultivation.

To use your bag, first sanitize your hands, scissors or utility knife and the outside of the bag with isopropyl alcohol. Open the bag and add your spawning substrate to the bag up to the rim, but don’t fill it to the top of the bag.

Allow the substrate to incubate for 2-6 weeks in a dark space until the mycelium colonizes the rye grain layer and begins to move onto the coco coir layer. Once the mycelium is fully colonized, increase the temperature, light and humidity levels to induce fruiting. Ensure proper ventilation by cutting or puncturing the bag for fresh air exchange during both colonization and fruiting stages.Psilocybin grow bags

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