Plant Purchase from Richters Herbs

I looked high and low for horseradish for the garden unsuccessfully at all the local nurseries.  I even tried the local grocery stores for horseradish root in the produce section hoping I could plant it.  I had had success a few years ago with a piece of horseradish root that grew in the house for awhile.  A kind soul on one of the groups I followed suggested I check out Richters.  Richters Herbs