Grain spawn is the standard for making your own ready-to-fruit blocks for indoor mushroom cultivation. We also offer select varieties in sawdust spawn (Shiitake LE3790) but have found most individuals find grain spawn easier to work with. These strains are specifically meant to be expanded into your substrate of choice (sterilized sawdust mixes, straw, etc) and grain-to-grain transfers are not recommended. Please see Liquid Cultures for growing into grain.
If you are a commercial grower and order 50+ bags a year, please contact us for our commmercial grain spawn rates.