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Hi, Chris, Thanks forHi, Chris, Thanks for consulting us from Bulgaria! Horseradish and spinach are entirely different in the ground, in cooking, in your mouth. Horseradish is a perennial—it will come back every year, proof that it can survive just about any temp. It has a very strong flavor. Here are a bunch of recipes using it: http://www.almanac.com/search/apachesolr_search/horseradish?filters=type:recipe Spinach is an annual: It will die with the first frost. So no, spinach will not survive the temps you cite. It can be used in salads and numerous other dishes. Put the word "Spinach" into the search box on this Web site and you will get lots of advice and ideas and recipes about it. Hope this helps! Thanks again for reaching out from so far!

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