If your kiwi vine is growing vigorously, you may be tempted to cut it back now. Don't do it until late February in Portland, after most of the risk of a hard freeze is past, but before the buds break (open).
The freshly cut ends of kiwi branches can be badly injured during hard freezes; they may die back a foot or more. However, pruning after buds open causes buds to break off and sap to rain down on the pruner.
-- Vern Nelson
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