Item #: Ujar02
Availability: In Stock
Usually ships In 2 Days
  • Natural Organic Brown Rice Flour
  • Vermiculite
  • Mineral Water
  • Liquid worm castings
  • Bee Pollen

Price: $35.00


    Our 8oz Ultimate substrate jars are the quite possibly the best on the net! We have worked for over 15 years looking for perfection! We finally found it! We have combined special organic brown rice flour with vermiculite, mineral water, Liquid worm castings and Bee pollen to create the Ultimate mushroom growing jars! Each jar has four pre-drilled holes in the lid and a top dry layer of vermiculite for added protection. We have customers who have been using our jars for over 10 years simply because no other jars will out-perform ours! With the Fastest possible colonization times, the largest possible mushrooms no other jars will perform like these! We use Ball 100% Glass Canning jars! No plastic substitutes like others sell!

    We hand make every jar the morning your kit ships so your jars are the freshest possible! They are pressure sterilized in our Autoclave for 120 minutes.

    Overall Customer Rating of 128 Reviews:

    Very satisfied

    • Accuracy
    • None
    Every time I’ve ordered anything from Midwest it has arrived promptly and accurately in its entirety. Along with punctual shipment and accuracy in orders their products are unparalleled in my opinion. I’ve been growing recreationally for a few years and for my purposes they are a perfect vendor for any myco hobbyist!


    The best growing supply house in america

    • fast shipping
    my third order and these guys are legit and ship fast


    Fast and a great mix

    Got my order with in a week. I have used this product a few times now and have had a lot of success.

    San Diego


    • quality product & customer sedrvice
    I received my substrate jars very fast after ordering(June 2020), and inoculated with my spore solution three days later. By day 5, mycelium was readily visible, and the the following growth has been really vigorous. Very gratifying results. I have been using MGK substrate jars since 2012 and have been really happy with their product and customer service.

    Best Reason To Buy

    Who needs more drama in their lives now ? These eliminate what I consider the messiest complicted part of the whole process. I appreciate the quality and convenience and will be ordering again.

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