Prepare Your Workspace:
Ensure your workspace is clean and as free from drafts and contaminants as possible. Wiping down work surfaces, grain bags, and syringes with isopropyl alcohol and wearing gloves can help maintain a sterile environment.
Grain:
Sterilized grain, such as corn or rye berry grain, is required and can be purchased from numerous vendors online or prepared at home using a pressure cooker.
Shake the Syringe: Before use, gently shake the syringe to evenly distribute the mycelium throughout the liquid culture. This helps ensure an even inoculation of the grain.
Flame Sterilize the Needle:
Using a lighter or a small torch, carefully heat the metal needle tip of the syringe until it is red hot. This sterilizes the needle, eliminating any potential contaminants. Allow the needle to cool for a few seconds before proceeding.
Inoculate the Grain:
Pierce the sterile needle through the sterilized grain bag's injection port or through a small hole in the lid of your sterilized grain jar (which should then be covered with micropore tape or a similar breathable filter). Inject a small amount of the liquid culture into the grain. The exact amount can vary dependent upon the amount of grain being used, but a general guideline is 1-2 ml of culture per quart of grain.
Incubate:
Place the inoculated grain in a dark, warm area with a temperature around 66°-75°F (19°-24°C) to incubate. Avoid direct sunlight and excessive heat or cold, which can hinder mycelium growth.
Wait and Observe:
Over the next few weeks, you should observe white mycelial growth spreading throughout the grain. This indicates successful inoculation and colonization. Once the grain is fully colonized, it's ready for the next step in your mushroom cultivation process, usually transferring to a fruiting substrate.