> >Mine said that mycorrhiza are specific to species of plants. >For example, Don in CA is selling the fungi for use with tomatoes -- >he has a strain that will grow and work with tomatoes. It may grow >and work with a few other plants, too. But there is no general >purpose mycorrhiza that is the answer to everyone's problems or that >will work with every plant. The last time I read Don's postings they >were testing their strain on many plants but it was sort of a shotgun >type approach -- there's no way to predict which plants will form a >symbiotic relationship with a particular strain. I thought the substance was specific to specific plants, having looked up the web page cited by Doreen Leonard last summer. I have a pretty good reference library, but I'm unable to find a definition for microrrhiza. For some reason I have a cognitive association between it and mycelium. Do you have a definition for micorrhiza? (I see I've been spelling it with three r's and you're not. Maybe that's the trouble) > >I have real questions about the usefulness of using any form of these >fungi in an organic garden such as yours -- one in which tomatoes are >planted in the same location year after year. My own anecdotal >experience is that tomatoes replanted year after year in the same >soil grow exceptionally well. My guess is that part of that result >comes from soil microbes that become established and flourish year >after year -- not necessarily just a single type of fungus but a >balance of many types of organisms. > >Liz > Excellent point. Thanks, Margaret, who still would like a definition if you can find one.