Q.Yellow trumpet vine
My yellow trumpet vines are 2 years old. Next spring will mark their third year in my yard. I have not yet seen a bloom, flower or even a bud. Is there something wrong with it? The vines have grown like crazy, beautiful foliage but no flowers. 🙁
Your plant is likely not mature enough to bloom.
Also if you over fertilize you may delay blooming even longer. If you have fertilized, do not add more for 1 year.
Check location, Full sun is important for blooming purposes.
Here is a link with more information.