Varieties of elderberries in Canada

Hi, I am growing American elderberry and am looking forward to having elderberry for medicine. I need to get John Moody's book. Anyone else in Canada growing the named varieties and how are they compared to American elderberry? I am in Saskatchewan.

I'm struggling to get Bob Gordon elders to establish. I've also got one or two Wyldwoods but all of them are having a hard time. They all seem to get winter killed, then regrow from their roots each year. There has been no compounded growth, just annual efforts that are wiped out each winter. Are they really that delicate?