Lack of flowers on oleander bushes

Question

My oleander bushes are very healthy and look beautiful except that they do not produce flowers. What is the problem?

Answer 1

Have you fertilizer your Oleander?
To much nitrogen will cause lots of green leaves and no flowering.
You can promote flowering by adding Phosphorous. Bone Meal is a good way to add the needed Phosphorous.

https://www.gardeningknowhow.com/ornamental/shrubs/oleander/oleander-growing-tips.htm