Just Right Xtra Premium Potting Mix A mixture of coir, humus, worm castings, diatomaceous earth, subcultures M and B, sulfate of potash, bone char and rare earth. I’ve had good luck with Just Right Xtra. It is made in New York, and I’ve visited the facility. It has one of the most horrific mixing chambers I’ve seen. The teeth of the Just Right Xrta mixer wouldn’t be out of place in a horror movie. The Just Right Xtra mixer means business. Just to try it and see, I cut the top off of a bag, poked holes in the sides, and planted. Share this:FacebookTwitterRedditEmailLinkedInTumblrMorePinterestPocketLike this:Like Loading... Related