Hi Liz,
We have some growing in our test orchard, but they are just 2 years old. We got our scions from Palatine Fruit and Roses in Niagara-On-The-Lake in Ontario (likely zone 6, maybe 7?), and if you can get ahold of Rene Schmidt there, he would be able to give you better insights; the phone number is 905-468-8627, and this is their website [
palatineroses.com] . He spoke very highly of them, I'm looking forward to getting some fruit!
Cheers,
Steph
Silver Creek NurseryZone 5 in Wellesley, Ontario