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

Very satisfied with the product. It has colonized very quickly and so far, no contamination. Thank you guys.

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

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.

Have bought 3 times and was treated to pre contaminated substrate. I’ll stick with m*sh c*cult from now on.

I spread this over my grain spawn once the mycelium had completes enveloped the grain spawn. I think it really encouraged fruiting and I got some huge mushrooms.

research purposes, and microscopy purposes only

marginal value, due to contamination problems: at least one bag was contaminated with a fungus that was starting to propagate prior to use; at least two other bags in the same order had contamination issues; opt for substrates that are less prone to contamination; if you are growing dung-loving mushrooms, then perhaps look for other products or DIY on the pasteurization

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