‘Boomr Bag’ (5 lb) Manure-Based Sterile Mushroom Bulk Substrate | Maximum Yield Formula | Made in USA | Grow Dung-Loving Mushrooms | North Spore

Fast shipping and very clean and high quality from its box and provided instructions to the actual bag all top notch quality, I will update about the results but so far I am happy with my purchase and definitely purchase more of this products of this seller. Highly recommended

make sure you mix with coir or something.

Great

Contaminated, the bag that arrived was made over a year ago. It was very dry for starters and the grew both trichoderma and cobweb mold. Never saw cobweb prior to this. Because it was so old I shouldn’t have used it and immediately returned it. You are paying for pasteurization but I’d definitely suggest for you to pasteurize it again and not rely on it. I waited to review because I wanted to be certain it was the substrate causing the issue. Used it again this time as an addition to CVG. Same results. I love the other products this company produces and hate leaving a review like this.

If you want the best 💩 for your Mushrooms, this is the Best💩! No 🐂💩!

I switched to boomr bags after being unsatisfied with other pre-pasteurized substrates and mixing and sterilizing my own. It's not cheap, but the end result is superior.Keep bag for at least a week before using to check for contam. North Spore will replace for free any contaminated bags if you contact them. I've never seen a contaminated bag even after over 20 orders, but I have had to get north spore to replace a grain bag which they did hassle-free. Just take a pic of the contaminated and the lot number sticker on bag and email them.For anyone saying this substrate doesn't work for manure lovers, I'd say you just don't know how to grow mushrooms. A lot of people contaminate batches themselves without realizing it.The bag may come too wet or dry. Too dry, just spray with distilled water during mixing with spawn in sterilized room. Too wet (you can tell if water separates from substrate and you can see liquid in bag) let it dry out by spraying breather patch with alcohol and unfolding bag a little and let sit a few days.Always spray breather port with alcohol before handling or moving it from box. Airborne bacteria can get pulled into bag from patch.

This sat for weeks before use, no issues with leaks or any kind of bad stuff growing in it. Moisture content was perfect even after sitting so long. I added this to two separate bags of mycelium that was growing in other substrate bags, allowed a few days to mix and colonize a bit more, then dumped into growing trays that had lids and air vents. Mycelium fully colonized within a week, thick white carpet of fuzz was gorgeous and happy. Moisture content stayed perfect throughout growing cycle. Absolutely no sign of contamination or mold or anything bad even after several months. Would recommend and buy again

I gave it 3 stars because the first time I used it was fine (not great, contamination manageable) but I got mad contamination when I used it recently. I’ve used other brands of the same type of product with great success. I spent the money and thought I was getting a substrate I wouldn’t have to worry about, but unfortunately that was not the case.