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

Price: $35.00


    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 111 Reviews:

    Best out there

    • Quality
    • customer service
    I've been using jars from Midwest for a few projects now, and I have absolutely no complaints. I've not had a single contamination problem, even once. The customer service is amazing as well. One of my orders had a damaged jar (shipping problem, not their fault) and they offered to replace my shipment or give me some store credit. I would highly recommend MWGK to everyone

    Great and sterile

    Jars were amazing cuts all the bulls**t out and fast growth

    Perfect 12/12 colinzed!

    My last two orders of 12 jars have been perfect colonization! Always super fast delivery and the Best packaging.

    Fast colonizers and contam resistant-great jars!

    As the title says, these are great. I've done two rounds using these jars, and each time they've colonized VERY fast (mycelium within a day), and had zero contams.

    I had one damaged jar in each order, but Midwest was super responsive in offering free replacements.

    I use these for cakes to bulk tubs, and results have been great. Highly recommend.


    Fool proof

    • HEarty
    • effective
    • great packaging
    • NONE
    These jars have been 100% effective and hearty with almost no maintenance while awaiting birth! Not 1 jar has ever failed to colonize a cake, fruit and produce several flushes

    You May Also Like

    Mega Mushroom Grow Kit

    Mega Mushroom Growing & Incubator Kit

    Price: $137.00

    Ultimate Mushroom Growing Kit

    Ultimate Mushroom Growing & Incubator kit

    Price: $97.00

    Simple Mushroom Grow Kit

    Simple Mushroom Grow Kit

    Price: $55.00

    The Mushroom Ecosphere greenhouse,grow mushrooms,grow tent

    The Mushroom Ecosphere

    Price: $209.00