Bulk Substrate Mix

Premium Select Bulk Substrate 

Take your mushroom cultivation to the next level with Premium Select Bulk Substrate, expertly crafted for optimal growth. This high-quality blend includes coco coir, vermiculite, hydrated lime, gypsum, pH buffers, pH stabilizers, and mineral water, plus a few secret ingredients for maximum performance.

✅ Fully Hydrated & Pasteurized – Ready to use straight out of the bag!
✅ Long Shelf Life – Sealed 5-pound bags can be stored in the fridge/freezer for up to 6 months.
✅ Easy to Use – Just mix with a fully colonized spawn bag and start your bulk growing experience.

Designed for Maximum Contamination Resistance

Our Select Bulk Substrate arrives with the perfect "field capacity" moisture level, ensuring a hassle-free growing process. Years of testing and fine-tuning have resulted in a consistent, reliable formula that outperforms others in resisting mold and bacterial contamination.

Why choose our substrate?
🔹 Superior Mold & Contamination Resistance – Specially formulated with ingredients that naturally inhibit unwanted growth.
🔹 Pasteurized, Not Sterilized – Preserving the anti-microbial benefits of coco coir to keep your grow clean and healthy.
🔹 Ideal for Grain or Dung-Loving Mushrooms – Perfect for a variety of species!

Whether you’re a seasoned cultivator or just getting started, Premium Select Bulk Substrate delivers the quality and reliability you need for a successful grow.