Black eyed Susan vine

Question

My black eyed Susan vine has and continues to grow larger and larger however there are very few blossoms is there anything I can do to produce/promote them

Answer 1

Try a feeding of Phosphorous, with Bone Meal to help promote flowering.

https://www.gardeningknowhow.com/ornamental/vines/black-eyed-susan-vine/black-eyed-susan-vine-care.htm