Leon Fisk wrote:
Crown vetch was commonly used as a roadside cover... It was a bad
mistake, it is highly invasive. See:

https://html.duckduckgo.com/html/?q=...invasive&kd=-1

There are a lot of "vetches". Just be careful collecting along the
roadside and which one you're getting


Understood, I'm confident this is not crown vetch. The flower are puple,
the plant is annual.

That said you can just order/buy Common Vetch (Vicia sativa) seed:

https://html.duckduckgo.com/html/?q=...h%20seed&kd=-1


That would work, but it's going to be an alien variety. The plants growing
along local roads are already adapted to climate and soil here. And, they're
free if I can find them among the weeds... Tolerance of local conditions
is mostly what I'm after.

Thanks for writing,

bob prohaska