It's outside my comfort zone as I have used Arbico Organics Root Bulid 240, combined with NPK Microbes for years.. It utilizes glomus myco so it's good for cannabis, and it's interesting to have the added benefits that Kelp, and Humic provide added. I'm stoked to try it out. I may I incorporate it into my Root Build 240 regime and apply them both.Hmm, I'd be concerned that it would be mostly worm castings and also that they do not seem to list which species of mycorrhizae is in the innoculant. Only a few specific species actually form a relationship with cannabis. But, at $12 doesn't hurt to try it out. I'm happy with Rootwise Mycrobe complete which is both a mycorrhizae and bacterial innoculant in 1 package.