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Yes V, you do need to keep it in check.
In southern CA, they grow it on pergolas to keep it off the house.
I think the blossoms come out mainly on 2nd year growth.
Ours, in one season will climb from the main trunk 12 ft up a rock wall
and start growing in behind the 2nd story cedar shingles.
If left there the vines will break out the shingles.
It verges on being a nuisance, but we keep it out of tradition for the style of our house.
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