Posted: 06/03/2014 at 17:09
What I do isn't real forcing - it's just a bit of blanching really. Real forcing involved digging the plant up and exposing the root to frost, then taking into a dark and warm building.
Just blanching with a rhubarb pot or similar doesn't exhaust the plant as long as you stop picking it at the end of May/early June - that way it's not producing for longer than a normally produced plant.
Lots of well rotted farm yard manure in the autumn and it'll go on year after year like that with no deterioration, in my experience