15% supplementation is suitable for growing nearly all gourmet mushrooms. For Reishi or Shiitake, use our 5% blend.
 
Each 5 LB bag of substrate is sterilized and impulse sealed in a high-quality grow bag with a 0.5 micron filter for perfect air exchange. Sterilized substrate must be combined with colonized grain spawn to provide the mycelium with an optimum growing medium.
 
This blend consists of:
84% Hardwood Pellets
15% Wheat Bran
1% Gypsum
 
Please ensure the correct type of substrate is selected for your mushroom species! Some require hardwood based substrates while others flourish in poo-based mixes. Not sure? Feel free to Contact Us for help.
 
Buy 3 or more for bulk pricing!