Blue Sky vine

 

 

This Thunbergia is growing in the ground beside the old greenhouse, and has overwintered there 3 or 4 years. It seems to get bigger and nicer every year. It gets killed to the ground but returns every summer. It grows better if kept well watered but is not a real water hog. It grows well in the clay soil around here. They make a nice thick shade for the end of a sunny porch. I have never had any to set seed. I guess they need a longer summer. However they do root easily.
This is the same genus that has blackeyed Susan vine. I grew those for several in the greenhouse, quite by accident. They reseeded and eventually I got a group that had white eye instead of black. Interesting, but not as pretty as the blackeyed ones.