Someone gave me some roots three years ago. I planted them roughly (shoved a spade in, pushed it forward, dropped the root in, wellied the ground. I have a clay and shale soil and they are multiplying and dividing like a Biblical tribe of Israelites. This was in a corner of a field. The flavour of fresh,grated horseradish,mixed with double cream and a tiny bit of salt will spoil you for the best and most expensive of jars of the stuff.