Widely used as bird seed, whole millet is rapidly gaining popularity as grain spawn substrate for nutrifying and growing out your mycelium before transferring to a bulk medium for fruiting. Its small size increases the number of inoculation points for faster colonization.
Although typically more expensive than rye berries and finicky in the sterilizer, a 40% moisture by weight recipe will yield fairly consistent results using the no soak/no simmer method. Make sure to shake your jars!
Sold in resealable unsterilized 2.5kg bags.