Hi Gardeners, I have found that I can plant tomatos in the same area if I have to as long as I plant resistant varieties and do not have a nematode problem to begin with. I prefer to rotate my tomatos as well as other crops because I have enough room. For the average home gardeners this may not be a viable option. I have used MEDINA which is touted as a soil stimulator. It seemed to improve results in soil with a poor tilth and a poor response to fertilizer. Allen Bastrop Co.,Tx Zone 8 Liz Albrook wrote: > Margaret Lauterbach <gardeners@globalgarden.com> wrote: > > > I don't think we all have access to a botanist. At least I don't. > > What did yours say? Margaret > > 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 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