Boomer Shroomer Dry Bulk Substrate for Mushroom Cultivation (Coco Coir, Vermiculite, Gypsum) | Produces 10 Pounds of Pasteurized Substrate, Enough for Two Inflatable Monotub

Best dried sub if you know what your doing

Excellent quality substrate mix. The price is also more than reasonable. I was able to make out 2 monotubs and 6 shoe boxes with what I got from this kit and still have a least a quart left over. Heat or pressure sterilization before you use this substrate or any online bought substrate is critical. This simply mean you have to mix the substrate mixture with boiling water or pressure cook it. Also it can't be just kind of hot or luke-warm. The water has to be at a rolling boil when you pick it up to dump it in. I have used two methods the first is the easiest: I put my substrate mix in a generic hardware store bucket (make sure when you get one you include a sealing lid preferably with a rubber gasket! Hit it with iso when you get it home for good measure!) from there you put whatever ammount of boiling water; you have decided to use I honestly kind of wing it every time. I just make sure that the ammout of water I add is sufficient to cover the mix. Then once boiled-water is poured in put the lid on the bucket (yes the plastic will be hot and the lid will swell) the heat that is trapped in the bucket with the substrate will kill off all the microbes, bacteria, mold, mildew, etc. you have to let it sit for at least 8 hours in my experience if you try mixing your grainspawn with this super heated substrate the small ammount of still escaping steam will cook your mycelium alive like an omlet so don't rush it (it's also really easy to misjudge how hot the substrate is then burning your hand when reaching in to grab some, so be careful!) The second method just replaces the bucket with a large gasketed cooler with toggle locks. I just figured out that I can microwave the substrate to purify it as well so I got a large cheapo microwave off FB market and I use it only for sterilizing substrate and genetics saving equipment like glass petri dishes. It should be well thought out that this isnt a one time sanitize all thing - you can develop a contaminated substrate in your bucket while waiting to use it for another tub weeks later. That's where the microwave came in for me now I can dole out as much as I want and steam it clean in the microwave. So far I havent had any contams. I have how ever had some serious success! Thanks my myco peeps and I hope this helps someone.

Amazing substrate! Contaminate free and reliable every time!

I love this brand. Ashley is great too work with if you have any questions. She always gets back and very helpful and pleasant! These are quality sterile products you can count on. Always a fruitful result 🍄 🍄 Great, easy to follow instructions included. Woman owned company! Buy Boomer shroomer! Thank you Ashley 😊

Great customer service they were more than helpful and will make anything wrong they make it right plus some extra help I highly respect them and their products and customer service are amazing

This is the second time I’ve purchased soil from this company. The first time I used it, I tried growing Lions Mane but it didn’t produce any mycelium, no growth at all, so I gave it one more try and I’m glad I did.