Plain ole contractor mix garbage. Grows anywhere, with weeds and all. Dig out the dead grass, add some starter fertilizer to the soil, cover with a bit of top soil or grass straw, NOT the bail straw you see around for Halloween. In NY, the best time to plant would be late August- September so you get some roots before a frost sets in. Water with a garden hose daily, but don't drown it. Sometimes I'll make my own mix of seed that I have laying around. Seed does not expire, as long as you keep it sealed, and in a cool place. Don't believe the expiration dates on the bags. It's nonsense. I've planted 3 yr old expired seed and it grew just fine. Starter fertilizer helps a lot. Not too much.