Hello. I am having horrible trouble with both late blight and septoria leaf spot in my garden. I am wondering if there is a way I can get the soil back to a healthy tomato plant environment by next spring. Do I need to let the soil sit for a few years to finally eliminate all the problems? I've been having trouble for the past 6 years, and this year I thought I was careful and preventative by laying down new top soil and spreading mulch under my tomatoes, but no luck. Is there some type of chemical I can put in this fall that will kill it and make it safe to plant next year? Is there somewhere I can send in my soil to have someone analyze it for the best way to take care of it?
There is nothing that you can add or put on your soil to fix it. It will take time, 3-4 years of growing no tomatoes or anything else in that family, such as peppers, eggplant or potatoes, in that location. Here is info about those problems and rotating your crops. http://www.extension.umn.edu/garden/yard-garden/vegetables/growing-tomatoes-peppers-and-eggplant/ . http://www3.extension.umn.edu/sites/default/files/download/growing-healthy-vegetables_0.pdf . Here is the link to the soil testing lab also.http://soiltest.cfans.umn.edu/