Posted: 16/08/2013 at 18:48
Many years ago 3 or 4 of my runner bean roots, left in the soil over Winter, sprouted and grew again in the Spring. They are perennial in their native habitat, but it takes a special set of circumstances for them to survive in the UK. I think it must have been a mild, dry Winter that year. It might be possible to lift and store them like dahlias but I doubt the effort would be worth it considering how quickly they grow from seed.