Uncle Myc's Rabbit Manure Blend Substrate, 4 lbs

Give your mushrooms the nutrient-rich foundation they deserve with our premium Mushroom Substrate, made with 25% locally sourced rabbit manure from nearby small farms. Rabbit manure is naturally rich in nitrogen and essential minerals, providing a balanced, slow-release nutrient profile that encourages vigorous mycelium growth and generous harvests.

We work directly with local, small-scale farmers to source fresh, chemical-free manure you can trust. Every batch is then hydrated to field capacity and fully sterilized at 15 PSI for 8 hours to eliminate contaminants and ensure a clean, reliable growing medium. This substrate is ideal for manure-loving mushroom species.

Perfect for Growing:

• Button Mushrooms (Agaricus bisporus)
• Portobello Mushrooms (Agaricus bisporus mature form)
• Crimini Mushrooms (Agaricus bisporus brown variety)
• Almond Mushrooms (Agaricus subrufescens)
• Shaggy Mane (Coprinus comatus)

Why Choose Our Substrate?

• 25% Rabbit Manure for superior nutrient density
• Fully Sterilized at 15 PSI for 8 Hours for a clean, contaminant-free grow
• Sourced from Trusted Small Farms — no commercial feedlot waste
• Supports fast colonization and healthy, abundant yields
• Specially formulated for manure-loving mushroom species
• Available in 2 lb, 4 lb, and 8 lb sizes to fit any grow operation

Whether you’re a home hobbyist or a dedicated cultivator, this substrate delivers clean, natural ingredients your mushrooms will thrive in.