The folks in Montana Z4/5 are having luck it seems with Coralstar, Blushingstar and Risingstar peaches.
RedGold nect has also been tested there and is a hit at Z5 and sometimes a miss at Z4. Most nursery descriptions say the same… alot of folks on here have even called it bulletproof… most folks think of it as a Calif. Nect since it was bred there and grown heavily there but may have a place in alot more folks orchards if the word gets spread around.
Anyways back on topic… this has been discussed before.