Duet Jessamine

Question

Very healthy looking Duet Jessamine with plenty of growth is not producing any flowers. Planted in spring. Has tripled in size with lots of very green vines and leaves but no sign of any flowers.

Answer 1

This could be a to much Nitrogen in the soil and a lack of Phosphorous.
You can fertilize with Bone Meal to correct this and encourage flowering.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm