Item #: ujar01
Availability: In Stock
Usually ships In 2 Days

6 Ultimate 1/2 Pint Substrate Jars Include:

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

Price: $20.00


    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 143 Reviews:

    Come all ready and good to go

    So far so good on inoculation of the spores in these out of the box. Come done, foil on top and packaged well. Will order more of these again in the future.

    Makes growing so easy

    As a beginner at mycology, it was daunting to get into growing. Buying this kit made it so easy. All six jars have populated with mycelium and I have no contamination thanks to following the instructions on the website. Very happy with this product.


    Prompt delivery. Safely packaged. Quality product.

    I ordered six jars and all six worked exactly as expected. Thank you!

    Is a really great quality product that works very well for mushrooms! I might purchase it again.


    Substrate jars

    • price
    • quality
    • no shipping updates
    Quality product. Received 2 sets so far and have not had an issue with growth or contamination.

    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: $219.00