Substrate Jars

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...

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...

(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...

(LIMITED TIME 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...