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Ultimate ½ Pint Substrate Jars (6-Pack)

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(193 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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(202 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...

 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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(15 Reviews)
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Item #: PQC7 -
Availability: In Stock
Price: $6.99
Retail: $9.00
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(ON SALE!) 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...

(ON SALE!) 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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(122 Reviews)
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Item #: PQC3 -
Availability: In Stock
Price: $19.99
Retail: $23.00
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(LIMITED TIME SALE!) 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...

(LIMITED TIME SALE!) 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 ...

Premium Quick-Colonizing 5-grain Jar (30oz)

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(53 Reviews)
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Item #: PQC2 -
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Price: $9.00
Retail: $10.00
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(New!) 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...

(New!) 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, filled to 30oz. 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 30 ounces of nutrient-enriched organic rye berries and a mixture of Organic White and Red...

3-Pack Premium Quick-Colonizing 5-grain Jar (30oz)

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(67 Reviews)
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Item #: PQC9 -
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Price: $23.99
Retail: $27.99
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(APRIL SALE!)  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...

(APRIL SALE!)  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, filled to 30oz. 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 30 ounces of nutrient-enriched organic rye berries and a mixture of...

36 oz Premium Organic Rye Shake Jar

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(19 Reviews)
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Item #: RS1 -
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Price: $8.00
Retail: $10.00
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(ON SALE!)  We designed our brand new 36oz Rye Shake Jars from the ground up based on years of trial and error and customer feedback. We asked "What would be the perfect glass jar for growing...

(ON SALE!)  We designed our brand new 36oz Rye Shake Jars from the ground up based on years of trial and error and customer feedback. We asked "What would be the perfect glass jar for growing Rye grain spawn?" Nothing existed so we sought out different glass factories and ended up designing a custom mold for what we think is the perfect jar. We guarantee you've seen nothing like this before! Custom made 36oz Wide Mouth Jars feature: 36oz size - A large capacity jar for bulk growingWide...

Assorted Mushroom Sticker Pack

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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!-...

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.