3lb. Horse Manure Mushroom Casing Substrate

Our premium 3lb. horse manure substrate includes:

• Coco Coir
• Horse Manure
• Shredded Straw
• Vermiculite
• Mineral Powders ( Magnesium, Calcium)
• Gypsum
• Lime
• Oyster Shell Flour

Our horse manure substrate is fully hydrated, pasteurized, vacuum sealed and ready to use right out of the bag. Just combine it with fully colonized grain spawn, or use as a casing layer in your monotub grow. Each 3-pound bag comes sealed and can be stored in the refrigerator or freezer for up to 6 months.

Perfectly Hydrated and Ready to Use

Our Horse Manure Bulk Mushroom Substrate is always at “field capacity”, and will be the perfect moisture content when you are ready to spawn to bulk. Simply open the bag and mix – no need for additional preparation. We use only the highest quality ingredients and additives to ensure reliability and resistance to mold and contamination.

Unmatched Mold and Contamination Resistance

Our Bulk Mushroom Substrate boasts a high level of resistance to mold and contamination. We use specific ingredients that create an environment conducive to mushroom growth while inhibiting mold and bacterial threats. By pasteurizing (not sterilizing) at lower temperatures, we preserve the natural anti-microbial properties of coco coir, further protecting against mold and bacteria.

Ideal For Dung-Loving Mushrooms

When cultivating dung-loving mushrooms, our horse manure substrate provides the perfect growing medium. Experience the Gro Magik difference with a product designed to support healthy, robust mushroom growth.

Does NOT ship internationally.