Trumpet Vines

Question

I have had a trumpet vine for several years. It is only about 6 feet tall and has never bloomed.
Any suggestions would be helpful.

Answer 1

See this article for possible reasons a plant may not bloom:

https://www.gardeningknowhow.com/plant-problems/environmental/plant-not-blooming.htm

Since your trumpet vine has shown poor growth, it may also need additional nitrogen:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/understanding-nitrogen-requirements-for-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/nitrogen-plant-fertilizer.htm