Tomatoes wilt for a variety of reasons. During hot summer weather, water plants thoroughly once per week to avoid wilt caused by lack of moisture. Other causes of wilt include Verticillium and Fusarium wilt, tomato spotted wilt virus, walnut toxicity and stalk borers.
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Angela Nelson is a virtual assistant and freelance writer. She has been publishing online articles since 2008 for GardenGuides, eHow and Answerbag. Nelson has a passion for small business and flower gardening, which is portrayed in her writing.