Elevate your mushroom cultivation with Mycelium's Premium Masters Mix substrate. Our expertly crafted blend of sterilized alder and soy hull creates the ideal environment for strong mycelial growth, supporting a wide variety of gourmet mushrooms. Whether you're a home grower or seeking larger flushes, this wood-loving substrate is designed for cultivators of all levels. 

At Mycelium, we believe hardwood alder is a unique substrate for mushroom cultivation due to its steady decomposition rate, which creates a consistent environment for fungi ensuing predictable flushes and yields. Its excellent moisture retention further supports robust mycelial growth and mushroom fruiting, making it ideal for hardwood-loving species like shiitake, oyster, and lion's mane.

Why we love it

Expertly Formulated for Success 
Our carefully balanced substrate, made from 50% alder and 50% soy hull, ensures robust mycelial growth for various wood-loving mushroom species. Available in 5 lb or 10 lb options, it’s the perfect choice for all your cultivation needs.

Convenience of Sterilization 
Each bag arrives pre-sterilized, providing a contamination-free environment, so all you need to do is inoculate and watch your mushrooms grow. No complex sterilization is required—just simple, confident cultivation.

Bigger Bags, Bigger Harvests 
Our larger bags provide more surface area and nutrients, allowing for higher yields and multiple flushes. Maximize your harvest potential with our nutrient-rich substrate that sustains longer mushroom growth cycles.

Designed for Wood-Loving Varieties
Specially formulated to support mushrooms that thrive in woody environments, our substrate accommodates a wide range of gourmet mushroom species, making it versatile and ideal for home growers.

Perfect for Large-Scale Cultivation
Designed for efficiency, the substrate's consistent nutrient balance and moisture retention make it ideal for scaling up production, ensuring uniform growth and maximizing output across large batches.