see this article Looks like horseradish is a winner!!!
another good thing to try sooner or later – making my own horseradish sauce how to here
I wonder how hard it is to grow your own horseradish. They say it is very hardy, so maybe not so difficult. It grows tubers underground and has to be shoveled up, not pulled. Here we go – how to plant horseradish. It’s not too late this year to plant it. It needs full sun so now I need to know what its companion plants are. Companion Planting – good to plant it near potatoes and to use the bottomless pot method to contain it. a wealth of information here!
This one says you can eat the leaves in sandwiches (^_^)