trumpet vine not blooming

Question

Have had trumpet vine for 3 years. Last year it had only 1 flower and has not flowered any as of yet. Do you have any suggestions so I can have flowers on it?

Answer 1

I would guess that the nitrogen to phosphorus ratio is off. The soil may have an abundance of nitrogen, which would result in nice, healthy green growth but little to no blooms. Without the right amount of phosphorus, it will not bloom well. Bone meal is a great way to add phosphorus.