If I had livestock it would be better. I mowed it to the ground in early August; it came right back up. Last year, it went from late May to October, still green and NO rain in that entire time. The soil is intrinsically lousy, but at least is is not suffering the allelopathic and dessicating effects of non-native annual grasses and other broad-leaf weeds.
Of course, I hand-weed it, acres, seven months a year, full-time. I am told by people who should know that ours is perhaps the only restored grassland in North America that is as purely native. You can read more about our project here.
I own native grassland, never been plowed.
If green bothers you that much, get a goat.