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...

This new combination is prepared in a wide mouth tapered 16oz Jar. 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 optimal growth use 3 jars per 5 lbs of casing mix. Each Jar requires 2-3 cc's of spores

(Due to supplier shortage on Glassware- These are back-ordered until further notice) Midwest Grow Kits is excited to release our new quick-colonizing 5-grain blend. This new 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! After colonized, break up and mix with casing! For bulk casing grows use 2 jars per 5 lbs of casing...