Perhaps anticipating autumn in these dry conditions. Never heard of growing one in a pot - hope you have plenty f space for it to climb up - they get huge. If its still small enough to be in a pot its probably too young to flower yet.

Hi, I agree with Steragram, its common name is 'mile-a-minute vine, but it only appears that way if you take your eye off it, Derek.

Its probably outgrown its pot - but think three times before you release it into the wild by planting it - it will travel long distances. I once found growth from one at the end of a long pipe - when I traced it back, it was coming from easily 50 feet away in next door's garden...

thanks foiks