Free Shipping on all orders over $99
Chat With a Growing Expert Live (M-F 9am to 1pm CST)
Customer Support (M-F 11am to 5pm CST) 1.800.921.4717

Ultimate ½ Pint Substrate Jars (6-Pack)

Availability: In Stock
Usually ships In 1 Day
Item #: ujar01
review-star review-star review-star review-star review-star
4.91 stars, based on 232 232 review(s). | Write a review
Retail: $29.99
$6.00
Price: $23.99
You Save: $6.00 (20.0%)

    Our PF-Tek Style (BRF) Brown Rice Flour Jars are still the fastest and easiest way to grow mushrooms. While many new methods of growing have come and go over the years, our jars are still a customer favorite.


    6 Ultimate 1/2 Pint Substrate Jars Include:

    • Natural Organic Brown Rice Flour
    • Vermiculite
    • Mineral Water
    • Liquid worm castings
    • Bee Pollen
    • Fully Sterilized for 120 minutes - Ready to go!

    Customers Also Bought (check to add to cart)

    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 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.

    6 half pint jars with aluminum foil bubble wrapped for proetction

    Overall Customer Rating of 232 Reviews:
    review-star review-star review-star review-star review-star

    Jars

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    Cons:
    Work as expected. Simple and cost effective.

    TX

    As always

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    Cons:
    I am a repeat customer.
    Arrived on time and packed with care.
    Love the substrate jars for their ease, small space needs, and consistency of performance!

    New Mexico

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    Cons:
    Best spawn/sub jars I've worked with so far. Colonizes VERY easily if inoculated correctly. Never had any issues with them and out the dozens I've used in the past the only ones I lost to contam were due to improper sanitization on my end.

    Excellent purchase, as usual!

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    Cons:
    The jars arrived quickly and in good condition. We've placed a few orders now and they're always high quality and just as ordered. Thank you!

    Arizona

    Amazing

    Rating:
    review-star review-star review-star review-star review-star
    Pros:
    • Fast
    • Clean
    • Sterile
    Cons:
    I always come to this site when I grow, I love that they used to provide a whole guide book with step by step directions that I’ve kept for years, but now you can scan the code and it leads you to videos with whatever help you need! Ugh I’m so thankful for midwestgrowkits