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Old April 22, 2016   #33
efisakov
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Join Date: Nov 2012
Location: NJ, zone 7
Posts: 3,162
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I go to Rutgers website:
http://www.njweather.org/maps/nj-sta...mperatures-5cm
Most states have colleges that do research and post it on their agricultural website.
I googled soil temperature map for NJ and was lucky to find it.
For tomatoes it should be between 50 and 60 degrees.
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