I
had heard that this plant takes years to finally flower, but these are covered
with flowers and flower buds in just 17 months from seed. What I did was
to prune off two feet of the ends of the vines when new growth reached or
exceeded six feet. The plants sent out new runners at the first node
next to the cut. Flowers and flowers buds occur (for me) only on the new
runners, when they reached 2 to 3 feet in length. There were
no flowers or flower buds on vines which had not been pruned.