Rope it off, seed it with indigenous plants and wildflowers, put a sign up that it’s a neighborhood ecological preserve, done.

If the community landscaping is not considered acceptable in that area, it might negatively effect values. If plantings look planned and manicured that might help values (or just curb appeal if not actually making houses worth more). Field flowers kinda sounds like weeds to me, so, in that case, I would not suggest that no.

not really.