posted 7 years ago
Hi Mark, welcome to Permies!
It's possible the canes may be freezing. After reading a little about that variety, the prime ark freedom appears to have low chill requirements for fruiting, and it seems that in some cases a warm spell during winter can cause the canes to wake up just to then be nipped by the return of freezing weather. I don't believe this will ruin the canes, it may just mean no fruit for that following season.
"Study books and observe nature; if they do not agree, throw away the books." ~ William A. Albrecht