Bignonia and Wisteria
We live in France, south of Bergerac. I planted a Bignonia last year, and it looks very healthy but does not flower and it is a rampant climber. I also have a Wisteria which has made good growth. It was here when we bought the house. This doesn't flower either. The previous owners said it was at least 5 years old. I bought another 2 wisterias last year and both are flowering very well. I cannot understand it.
Certified GKH Gardening Expert
You likely have to much Nitrogen in the soil.
You can add Phosphorous with a Bone Meal fertilizer.