Dear Greg, I've conducted some tests using potting soils. The fungi does colononize the plants and the hyphe will go out into the potting soil from the roots of the plant. I've also read about a lot of failures that were started in potting soils and did well in the nursery, but when they were transplanted out... they failed. I think some of those failures were due to the introduction of higher phosphate fertilizers. It seems reasonable to think that if one starts a tomato plant in a good potting soil and keeps the plant in that soil, that the VAM fungi would benefit such plants. I would also consider introducing some rock dust to get added minerals and some sort of organic fertilizer... a tablespoon mixed into the entire pot ought to be sufficient. If you can find them, worm castings would be a good addition also. If you add some sand to that potting soil, you should have no problems with the VAM fungi on your tomato plants. Regards, Thomas Giannou Spokane, Washington -----Original Message----- From: Greg Park <Park.Steel@worldnet.att.net> To: Tomato@GlobalGarden.com <Tomato@GlobalGarden.com> Date: Monday, April 19, 1999 9:12 AM Subject: [tomato] Mycorrhizal Fungi in containers >Thomas and others not sick of this subject <g> > >Are there any studies or anecdotal evidence that M fungi improve growth of >tomato plants when planting in potting soil in a container? > >There seems to be many that believe these fungi live in the ground anyhow so >are not needed. By the same token, they are probably not present in potting >soil. > >Any one else try this product in potted plants? > >Greg >