I grew some green pole beans (variety unknown) this year from commercial seed, and I'd like to harvest some seeds from the plants to regrow for next year.
How do I do this?
I tried just picking some beans, pulling the seeds out of the pod, and starting them in a wet paper towel in a baggie in the window, which is the same way we started the commercial bean seeds. They just rotted.
Do they need to grow longer than for eating, and if so, how do I know when they are ready? Is there any treatment or preparations required before planting?