Spawn your own mushrooms with this set of four 8 oz. sterilized oat grain jars, perfect for indoor or outdoor cultivation. These grain jars come with a filter and injection port, making it easy to maintain a controlled environment for optimal growth. The jars are organic and fast-growing, with a running growth habit that makes them ideal for any room in your home.

The grain jars are suitable for all seasons, with a neutral soil pH and perfect field capacity watering system. They are child-safe and have a growth rate that is twice as fast as other mushroom spawn. These jars are made in the United States and are the perfect addition to any mushroom enthusiast's collection.