Thunbergia grandiflora 'Blue Sky Vine'

These are pictures of the Thunbergia grandiflora that is growing in my greenhouse. It has rooted in the gravel and gone it's own way, covering a large part of the top of the back part of the greenhouse. The one outside was killed back by our first light frost, but in the greenhouse and out of the reach of frost, it blooms on. This is a sturdy vine with lots of  3 inch wide blooms. I'll eventually cut it back, but I just want to see how long it will bloom.