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Ultimate ½ Pint Substrate Jars (6-Pack)

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(227 Reviews)
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Item #: ujar01 -
Availability: In Stock
Price: $23.99
Retail: $29.99
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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...

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...

Ultimate ½ Pint Substrate Jars (12-Pack)

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(249 Reviews)
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Item #: Ujar02 -
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Price: $37.99
Retail: $44.99
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(ON SALE!) 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...

(ON SALE!) 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...

24 oz Premium Super Quick-Colonizing 5-grain Jar

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(36 Reviews)
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Item #: PQC7 -
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Price: $7.99
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A 24 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically...

A 24 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically filled with nutrient-enriched organic rye berries and a mixture of mineral water fortified with gypsum and diammonium phosphate, which creates optimal growing conditions. The 5 different grains in the jar are typically chosen for their ability to colonize quickly, and the jar is designed to allow for...

3-Pack Premium 24 Oz Super-Quick-Colonizing 5-grain Jar (24oz)

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(203 Reviews)
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Item #: PQC3 -
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Price: $21.99
Retail: $23.99
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Our custom made glass jars are the only jars allowing your colonized spawn to easily slide out! Our 24 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of...

Our custom made glass jars are the only jars allowing your colonized spawn to easily slide out! Our 24 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically filled with nutrient-enriched organic rye berries and a mixture of mineral water fortified with gypsum and diammonium phosphate, which creates optimal growing conditions. The 5 different grains in the jar...

Premium Quick-Colonizing 5-grain Jar (32oz)

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(77 Reviews)
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Item #: PQC2 -
Availability: In Stock
Price: $8.99
Retail: $10.00
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A 32 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically...

A 32 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically filled with nutrient-enriched organic rye berries and a mixture of mineral water fortified with gypsum and diammonium phosphate, which creates optimal growing conditions. The 5 different grains in the jar are typically chosen for their ability to colonize quickly, and the jar is designed to allow for...

3-Pack Premium Quick-Colonizing 5-grain Jar (32oz)

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(167 Reviews)
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Item #: PQC9 -
Availability: In Stock
Price: $23.99
Retail: $28.99
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A 32 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically...

A 32 oz premium super quick 5 grain jar is a specially designed glass jar that contains a mixture of 5 different grains and is used for growing mycelium or mushroom spores. The jar is typically filled with nutrient-enriched organic rye berries and a mixture of mineral water fortified with gypsum and diammonium phosphate, which creates optimal growing conditions. The 5 different grains in the jar are typically chosen for their ability to colonize quickly, and the jar is designed to allow for...

3-Pack Organic Rye Grain Jars (32oz)

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(27 Reviews)
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Item #: RG32 -
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Price: $19.99
Retail: $24.99
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Our 32oz organic rye jars are a quick and easy way to start your next bulk grow. Rye berries are extremely high in nitrogen and release their nutrients slowly. This is why people have been using rye...

Our 32oz organic rye jars are a quick and easy way to start your next bulk grow. Rye berries are extremely high in nitrogen and release their nutrients slowly. This is why people have been using rye for over 50 years to grow mushrooms of all types! Our organic rye is nutrient-enriched with gypsum and other PH adjusters to give you a fast colonizing jar from spores, agar or liquid culture. 3 Jars which each contains 32 ounces of nutrient-enriched organic rye berries and mineral water fortified...

Mushroom Jars & Substrate for Cultivation

Substrate jars are the easiest and quickest way to grow mushrooms, and our mushroom substrate jars are unmatched. We’ve been working for over 15 years to find the perfect mushroom growing substrate formula, and we have finally found it!

At Midwest Grow Kits, we use only quality ingredients and materials on all our mushroom growing products. Our mushroom jars are no exception. The ultimate mushroom substrate jars are made up of organic brown rice flour with vermiculite, mineral water, liquid worm castings, and bee pollen. This blend creates the ideal environment for mushrooms to fruit and bring forth maximum yields.

Shop our mushroom grow jar products today and dive into the magical world of mushroom growing.