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Ultimate ½ Pint Substrate Jars (6-Pack)

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(198 Reviews)
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Price: $24.00
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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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(212 Reviews)
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Item #: Ujar02 -
Availability: In Stock
Price: $39.99
Retail: $45.00
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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...

24 oz Premium Super Quick-Colonizing 5-grain Jar

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(19 Reviews)
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Item #: PQC7 -
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Price: $7.99
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(Back in Stock!)  Midwest Grow Kits is excited to have our 24oz Super-Quick-colonizing 5-grain jars back in stock! This combination is prepared in a new type of glass jar now available in a...

(Back in Stock!)  Midwest Grow Kits is excited to have our 24oz Super-Quick-colonizing 5-grain jars back in stock! This combination is prepared in a new type of glass jar now available in a tapered 24oz size. This new design allows the cake to simply slide out when finished. These jars have been known to colonize in as quickly as 16-21 days! For bulk casing grows use 2 or 3 jars per 5 lbs of casing mix. Each Jar requires 3-4 cc's of spores ...

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

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(129 Reviews)
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Item #: PQC3 -
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Price: $21.99
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(Back in stock!)   This combination of 5 different grains is prepared in a tapered 24oz size. This design allows the cake to simply slide out when finished. These jars have been known to...

(Back in stock!)   This combination of 5 different grains is prepared in a tapered 24oz size. This design allows the cake to simply slide out when finished. These jars have been known to colonize in as quickly as 16-21 days! For bulk casing grows use 2 or 3 jars per 5 lbs of casing mix. Each Jar requires 3-4 cc's of spores

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

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(56 Reviews)
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Item #: PQC2 -
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Price: $8.99
Retail: $10.00
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(On Sale through 7/31/22) Midwest Grow Kits is excited to release our new formula of our quick-colonizing 5-grain blend featuring organic food grade grains! With a germination rate of over 97% in...

(On Sale through 7/31/22) Midwest Grow Kits is excited to release our new formula of our quick-colonizing 5-grain blend featuring organic food grade grains! With a germination rate of over 97% in recent tests, these jars have been known to colonize in as quickly as 18-23 days from spores and 10-14 days from liquid culture! Each jar contains 32 ounces of nutrient-enriched organic rye berries and a mixture of Organic White and Red Milo, Organic White and Red Millet and mineral water fortified...

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

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(73 Reviews)
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Item #: PQC9 -
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Price: $24.99
Retail: $28.99
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(Summer Sale! Ends 7/31/22)  Midwest Grow Kits is excited to release our new formula of our quick-colonizing 5-grain blend featuring organic food grade grains! This new combination is available...

(Summer Sale! Ends 7/31/22)  Midwest Grow Kits is excited to release our new formula of our quick-colonizing 5-grain blend featuring organic food grade grains! This new combination is available in a new 32oz wide mouth jar. With a germination rate of over 97% in recent tests, these jars have been known to colonize in as quickly as 18-23 days from spores and 10-14 days from liquid culture! 3 Jars which each contain 32 ounces of nutrient-enriched organic rye berries and a mixture of Organic...

3-Pack Organic Rye Grain Jars (32oz)

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(3 Reviews)
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Item #: RG32 -
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Price: $21.99
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...

Assorted Mushroom Sticker Pack

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(3 Reviews)
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Item #: STK1 -
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Price: $1.00
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Who doesn't love free stickers? We never know who throws them out or who keeps them so now you can add them to your cart for $1.00 and then use a coupon code to subtract that $1.00 off. We are...

Who doesn't love free stickers? We never know who throws them out or who keeps them so now you can add them to your cart for $1.00 and then use a coupon code to subtract that $1.00 off. We are always adding new stickers every month or two. The picture is an example of what we currently have and may vary. We love funny or cool looking stickers so if you have an idea or illustration that would make a great sticker, please share! - Add this to your cart and receive 3-4 cool mushroom stickers!-...

Vintage Mushroom T-Shirt

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(1 Reviews)
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Item #: TSH1 -
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Price: $19.99
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This retro mushroom t-shirt is a favorite around here. This shirt is made by Next Level Apparel and is extremely soft and comes pre-shrunk. Features Available in S,M,L,XL,XXLSuper-Soft tri-blend...

This retro mushroom t-shirt is a favorite around here. This shirt is made by Next Level Apparel and is extremely soft and comes pre-shrunk. Features Available in S,M,L,XL,XXLSuper-Soft tri-blend UnisexPre-ShrunkManufactured by Next Level Apparel Fits true to size

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.