How Do I Get My Rose Bush To Create A Bloom?,

Question

It grows strong branch but no bloom for several years

Answer 1

This happens, often, because of low soil fertility, or too much nitrogen with little phosphorus and potassium. Fertilizing with a fertilizer meant for roses may help. This article will offer more reasons for roses that fail to bloom:

https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knock-out-roses-wont-bloom.htm