Mine grow in a large pot with a tomato cage. If it is a new (small) plant, let it grow to about 1 1/2 ft above the top ring of the cage. Next, gently bend it down and wire/tie it so it stays that way. DO NOT crimp the stem; bend it carefully. Let it grow above the top ring again, same amount as before. Bend down again and fasten it in place. After the 3rd time, it should be stressed enough to bloom in its season. I've seen vines a little over 10 ft bloom from this treatment. It 'fools' the vine into thinking it is at the top of the canopy. Be careful when moving around a very young vine because the stem is still pretty soft, especially if a fast grower, and may actually break rather than bend.
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