Wilted tomato leaves could result from frostbite. Frost causes a darkening of the leaf tissues, which later wilt and then turn brown, according to the Ontario Ministry of Agriculture Food & Rural Affairs. Tomatoes exposed to temperatures just above freezing can suffer from chilling injury, which also causes wilted foliage.
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Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.