This Manure Based Mini All in One Grow Bag weighs 1.5 lbs and is equal to 1.5 quarts in substrate. For your convenience Out-Grow LLC has made an all in one manure based mushroom grow bag solution to simplify the gourmet mushroom cultivation process. This all in one grow bag has two different layers of substrates so there is no need to transfer substrates to different bags or trays thus reducing the chance of contamination. The mini all in one grow bag is horse manure based for all dung loving gourmet mushroom species. Fully hydrated and sterilized with a five micron filter patch and self healing injection port. Simply inoculate the rye berry layer of the substrate with 2-5 cc of your favorite gourmet mushroom spore solution. You must provide your own gourmet mushroom culture as none is provided. This sale is for a bag of sterilized substrate only. After inoculation allow your all in one bag to colonize in room temps for 4-6 weeks until your first flush of mushrooms. Mixing the bag once after 50% colonization is optional and can decrease colonization times. These bags hold 1.5 pounds of substrate (about 1.5 quarts of substrate). Instructions are included. This mushroom grow bag is great for beginners and professionals!