I have some of those frost-hardy kiwis, three years old (one male, two female). They have intertwined themselves in the back chain link fence, and I'd like to train them over a (yet-to-be-built) pergola instead.
When should I prune the vines, how aggressive should I be? I suspect that they ought to be no more than a year from starting to set buds/fruit, so I don't want to thwart my efforts at getting another "snack bush" for the kids.
Thanks, Mark