

🍄 Grow like a pro—unlock your mushroom farm’s full potential!
Myco Labs Premium Bulk Mushroom Substrate Mix is a 5 lb fully pasteurized, nutrient-optimized growing medium designed specifically for dung and grain-loving mushrooms. Its unique pasteurization technique preserves essential nutrients, while the calcium+ mineral blend ensures perfect pH balance. Pre-hydrated and ready to use, this substrate maximizes water retention and supports high-yield, contamination-free mushroom cultivation for both beginners and experts.





| ASIN | B0CQ33CN59 |
| Best Sellers Rank | #16,393 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #587 in Garden Fertilizers |
| Brand Name | Myco Labs |
| Customer Reviews | 4.4 4.4 out of 5 stars (303) |
| Global Trade Identification Number | 00850058190006 |
| Item Type Name | Substrate Bag |
| Item Weight | 5 Pounds |
| Manufacturer | Myco Labs |
| Style Name | American |
| Unit Count | 80.0 Fluid Ounces |
| Volume | 5 Liters |
J**T
No contam
I used this along with their 5 grain spawn for my first few ever mushroom grows about a year ago and everything went great. No contamination and bountiful harvest.
S**C
Excellent Quality
Excellent quality
T**E
Excellent
This is wonderfully moist, rich, sterile substrate. Mixed in a monotub with about 2 pounds of mycelium, using layered method. Was careful about sterility, but with 2 pounds of mycelium, it would be tough to screw up. Bought the spawn grain bag from north spore. I had a huge yield in about 3 weeks. Could barely see the substrate through the thick mushroom growth. Just used limited oxygen, grow lights, steady temp of 75, and constant moisture. Inside moisture should be 95 to 99%. If you do these things, they will come to you.
J**S
Bulk substrate for mono tubes ect
Looks perfect, doesnt have airport or injection port like grow bags do for all in one growing more just for mono tubs type of growing
J**S
very clean
no joke, i opened a bag of this up used half then rolled up the bag and threw it in a cupboard and forgot about it for at least 8 months. Found it looking fresh as the day i tossed it pasteurized it in my instantpot just to be safe and it is still going strong.
K**H
3 flushes
Decent substrate allows me to do 3 flushes every time I run a new batch of caps. most I got was 4 for double the price from a different company. I'll stick with this average quality substrate. It works good. Does the trick.
M**T
Growing materials
Perfect
A**.
Contaminated product
Contaminated product, with ammonia / sulfur and poo smell. Killed all my healthy myscelium
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