The Snarky Gardener is managing his herd of Jacob’s Cattle beans.
Saving bean seed is really easy. Allow your bean plants with with beans still attached to turn yellow and die off. Collect the seed pods. Open up the pods and there are your seeds. You will want to let these dry out completely before putting them in an airtight container (I use old vitamin bottles though glass jars will work also). Make sure to keep an eye on them over the winter as they could mold up if there was any moisture in them.
After I do my “shelling”, I like to divide them up based how they look. Some will be deformed or have some flaw that makes them less than perfect. These will be put into the “eat me” pile. Jacob’s Cattle beans are specifically “dry” beans (think kidney or black beans), but I do eat some green.
So, you might be asking “Why does the Snarky Gardener bother with saving bean seed when it’s so inexpensive to buy at the store or online?” In a word, adaptation. These plants grew up in my garden with it’s specific conditions. Plus beans make the soil better, especially through their nitrogen fixing nodules.