Thanks for the advice - sounds as though I may have to move mine too. Forgive me for sounding stupid (never grown asparagus before), but does the fern die back in the winter? I guess what I'm worried about is whether it will be obvious which bits are plant, and which are weeds! Also, once I've moved it, should I then leave it for a couple of years before taking any asparagus to eat, or would it be OK to harvest on the basis that it's been growing for years, albeit in a different position?
Thanks again for the help, this site is amazing!!