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Old March 14, 2017   #14
Durgan
Tomatovillian™
 
Join Date: Feb 2013
Location: Brantford, ON, Canada
Posts: 1,341
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Zone 5 about 15 April. But it can be cold and they will rot. Ground temperature at root level should be about 18 C. Below ~15 the potatoes don't grow.
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