My 7 year old Jasminum officinale (poets jasmine) growing over metal arched arbor has gotten too heavy & needs major pruning. Arbor has a rope tied to fence to keep it upright when the wind blows. I've pruned it lightly every summer but it needs to be cut back hard. I live in Skagit county WA & temp is mild. Can I prune it now or should I wait until after it blooms late spring? It's leafless now so much easier to do now then later. I'm new to the forum but have visited for years as info is so helpful.