Sterilized Master's Mix Bag 5 lbs

Name: Midwest Grow Kits Sterilized Master's Mix Bag 5 lbs - Sterilized Master's Mix Bag 5 lbs
Brand: Midwest Grow Kits
SKU: 45978238255253
Price: 12.99 USD
Availability: InStock
Rating: 4.2759 (15 reviews)

4.5 (1,234)

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Black

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Description

Ready-to-inoculate. 100% contamination-free. Trusted by commercial growers.
Our Sterilized Master's Mix Bag is the same optimized substrate we use in our own professional grow blocks — now ready for your bench. This 5 lb bag of pre-hydrat...

Reviews

4.3

29 ratings

Shipping

Once again shipping is disappointing 5 days late today and tracking says still in seattle

Brian · July 16, 2026

Perfect density

Rich, perfectly field-wet, sterile and it is perfect for those many varieties that won’t thrive quite as well in Bulk Substrate and Casing Mix, which I’ve seen as best for psilocybes/cyanescens. I’m using it for the first time with Lions Mane and King Trumpets. So far so good, 7 days and primordial and pins are starting to flourish. It drains better and is lighter than MGK’s Bulk Casing and Substrate. Great product.

Terrell · May 12, 2026