Portland

If you still want grass, we have native grasses that you can sow from seed, and a lot of local garden shops that sell native seed mixes:

https://gardenshop.symbiop.com/collections/native-plant-seeds/products/low-grow-native-grass-economy-mix-sf?variant=43023485436145

and

https://ptlawnseed.com/collections/native-seeds

Would be my two places I'd recommend. And fall is the ideal time to be sowing.