Howdy, My soil is pretty well balanced, been a garden here in same spot since the late 1930s, my Dad was quite a gardener, and each year added a lot of manure, grass clippings, leaf material, etc. etc. I did not add any sand. Don't feel comfortable discussing the vendor that sold me the Mycorrhiza, since the season has a long way to go, and the weather has been really bad. (Plants got frosted the 8th of June) I'll keep records as to dates of first fruit, total weight produced, by the plants in my test group and the plants in the control group. My sample size is so small, that I am reluctant to take the results too serious. If you have any questions, I'd be happy to reply off list. Good luck, Tom North-Eastern CA Orchid wrote: > > > Maybe what we need is an agency to certify that the product being shipped > meets "standards". Tom, just for informational purposes, where did you > purchase your Mycorhizza? It sounds like you know what you are doing, did > you add sand to your soil? > > > >