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!

These are amazing. Instead of knocking up a bag or a small can PF style, you can use the liquid culture on one of these 30 ounce jars and it’s amazing the results you get and the mycelium that you get to study under the microscope. With liquid culture (also used the Midwest liquid culture kit with luminous lucies spore syringe)it was completely cultivated almost in under three days. Almost overnight it seemed. I love Midwest grow kits thank you! Much love.