Posted 2/14/2017 19:09 (#5840000 - in reply to #5839591) Subject: RE: Horseradish around East STL questions
NW Washington
According to this Collinsville IL is the capital of the world for growing horseradish. http://americanprofile.com/articles/horseradish-capital-of-the-worl...
I had some once in my garden and it was almost impossible to kill after it was established. I think it is in the brassica family.