Quote Originally Posted by jackal2 View Post
My Grandad used to specialise in runner beans so I'm well versed on them. I always pick them and freeze them young though. Nothing worse than a stringy runner!
True, which is why I grow a stringless variety. Even they can get stringy if you don't pick them early enough, but once the pods show swollen beans I leave them on the plant to wither and then use them for next year's crop.