Pruning blackberry canes
A quick question: is this an OK time of year to prune blackberry canes?
I spent the weekend clearing a massive blackberry bramble and constructing a 2-wire fence to tie the living primocanes to (pics coming soon). Some of them, however, are 10-15 feet long.
From what I've read, you want to prune (or "top") them to the height of your fence. But the readings disagree on when you should do that (I've read late fall, winter, early spring and late spring).
I live in the relatively temperate Northen California growing zone. It has been dropping below freezing at night, though that should likely end soon.
I *think* it should be fine to top them now, given the plant's winter dormancy. But if anyone has advice to confirm or contradict that plan, I'd love to hear it.