William Schlegel wrote:I have blue elderberry and eastern black elderberry (canadensis) in my yard. Blue elderberry grows all the way from Western Montana South to Southern California and beyond.
Stark Brothers says zones 4-8 for Nova and York.
If they don't flourish try Canadensis
https://www.fnps.org/plants/plant/sambucus-nigra-subsp-canadensis
I actually have plenty of other elderberries, 6 wild and 6 “John” elderberry, (and I did actually just get 4 blue elderberries!) so I know there’s plenty that flourish here, and I do plan to get other cultivars like Adams and bob Gordon. My main concern was just that it’s too hot down here for those two specific cultivars because they originated so far north, but we definitely have plenty of moisture here, lots of rain year round and humidity, so as long as they’re heat tolerant I’m hoping they’ll do well! Everywhere I’ve read says zones 4-8, I just wanted to see if there was anyone successfully growing it in this climate, because they are apparently the best “commercial” varieties and I am in the process of starting an elderberry farm, so I want to get the most productive varieties