I harvested a bunch of the pods from my moms backyard last year and plan to plant a whole lot over my chain link. Since it came up recently here I figured I would offer the rest of my dried pods to anyone who wants to try this vine out this year. Pm if you are interested, I only want enough money to cover postage and will just divide the amount of pods between whoever wants any.
The one bunch of vines in my moms yard was started by three seeds and it was massively tall and about three feet wide, and she trimmed it liberally too, so I am calculating for myself one seed every foot to so with about 10 feet to climb.
Location: Arkansas Ozarks zone 7 alluvial,black,deep loam/clay with few rocks, wonderful creek bottom!