Item #: Ujar02
Availability: In Stock
Usually ships In 1-2 Business Days
  • Natural Organic Brown Rice Flour
  • Vermiculite
  • Mineral Water
  • Liquid worm castings
  • Bee Pollen

Price: $35.00

    Quantity:

    Our 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 33 Reviews:

    Spawn jars & bags

    Rating:
    Pros:
    • Quality
    • Ease Of Use
    Cons:
    I must say I've been very happy with my experiences with Midwest Grow Kits products. I've yet to lose a jar or bag to contamination and everything has gone smoothly with all the products I have purchased. I'm glad to see the new 24oz jars with the new syringe port, I expect I will have the same results with them and they look like they will be much easier to use. It's good to see MGK adding new and useful products to their catalog, it shows that they genuinely care about their customers and their experience. Finally their shipping and order fulfillment is fast and secure rounding out a great customer experience all around. Highly recommended.

    CO

    Are really great.

    Rating:
    Pros:
    Cons:
    They showed up quicker than I expected and were in great shape.

    New Glassware!! Nice.

    Rating:
    Pros:
    • Professional results
    • always sterile
    • perfect moisture content
    Cons:
    • no recycling program
    Hey guys, thought I'd finally review your jars. Been buying these for years and noticed you guys switched to a different brand of glassware! What I noticed was seemed like a thicker glass, I like that the sides are totally clear now, no swirly glass art like on the Ball brand jars. They seem a little taller than the old ones.. Are they bigger size? Noticed the "MGK" Logo in the glass on the bottom of each jar, pretty sweet! You guys must have had these custom made! Overall I was just curious why the change and want to say that they look good! Looking into the jar seems like HD compared to the others.. 2 thumbs up!! I also want to say, Ive tried making my own many times following youtube videos and even using the same ingredients you do and they never turn out as good. The difference is worth the price I pay for yours!

    Most Reliable

    Rating:
    Pros:
    • Quality
    Cons:
    These jars are the most reliable

    Oregon

    Quality product

    Rating:
    Pros:
    • All good
    Cons:
    • Meh
    • not so much
    I have ordered all of my grow supplies from Midwest. Grow kits, supplies and 1/2 pint substrate jars, have all been received in good shape and in a timely manner. I want to try the spawn bags for my next grow. Great how to videos as well. Thanks for being there. Blessings.

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