i’m not at all suggesting that you go an collect seeds from local parks. my point was that if you’re trying to research what will work well in your particular area, there’s no better way to go see what’s actually growing in your area.
if you want to start instead by looking to see what your local seed suppliers have, then i would suggest looking for local native seed suppliers. for example, in my area, i could look at the Native American Seeds catalog.
whatever you end up choosing, i hope you consider a mix of plants rather than just a monoculture.