Skip the pasteurising and sterilising - this bulk CVG substrate arrives ready to use straight from the bag. Made from a professional blend of coco coir, vermiculite and gypsum, it is fully sterilised and hydrated to the ideal moisture level for spawning grain to bulk. Simply open the bag in a clean area and mix with your spawn.
 
Available in 1kg, 2kg and 3kg bags to suit tubs of different sizes. Each batch is prepared and sealed under sterile conditions in the UK, so there is no contamination risk from unsterilised substrate.
 
Ideal for grain-to-bulk transfers, monotub fruiting chambers and shoebox setups.