Great spawn jars for bulk grows that'll only take about half the time of a spawn bag to colonize and be ready to mix with substrate. Colonizes VERY quickly and very thoroughly with thick, brilliant white mycelium growth all the way through. Recolonizes in substrate just as quickly.

As of now I have yet to have any contam and it really does colonize extremely fast.

Very impressed with the quality of these. I was able to harvest literal pounds from just this kit I ordered. Very simple. Will always order from these guys and you always order with 100% confidence and satisfaction.

<p>I have ordered from Mid-West off and on over the past 7 years. Products have always show up as ordered, and on time. This last order of 24-ounce, five grain jars were delivered in perfect condition and innoculated perfectly. I will definitely continue to do future business with Midwest, hands down a great company, I give them five stars all around</p>

Purchased 30 of these after reading about them on a blog. They truly are not overrated! Super fast colonization (14 days) and the two jars that did not fully colonize may have been my fault, but I know this hobby is never 100% in anything so I will be buying again!