Why won't my black eyed susan vine bloom I have alot of vines and leaves but no flowers?

Black-eyed Susan vine (Thunbergia alata) will grow in any reasonably rich soil with adequate drainage. Full sun is preferred, except during the summer months, when part-shade and liberal water should be provided. Support the stems and prune densely packed foliage during early spring.Propagate from seed in spring and cuttings in summer. One other thing I have personally experienced is some plants cut back flowering during the summer heat and resume blooming as the days become cooler.

Why won't my black eyed susan vine bloom I have alot of vines and leaves but no flowers?
Sometimes when there is too much nitrogen in the soil (ie you are fertilizing every 2 weeks) all flowering plants produce more leaves and less flowers.

You could try fertilizing less. Or use something that is ecologically more kind to the soil (ie compost).

Good luck - happy flowering!
Reply:You don't need to fertilize much, but I don't think that is your problem. Actually, you most likely don't have a problem. These vines stop blooming in hot weather. Mine is doing the same right now. As soon as it begins to cool down a bit (September), they should begin blooming like mad again.
Reply:I gave mine some plant food to help it bloom better. Do you have it hanging in direct sun? It needs a lot of sun and water. I still can't decide if I like this plant or not. Some days it has lots of blooms and other days it just looks bare.