I pruned my 5 knockout roses early spring. Now, they are all busy producing new shoots and leaves, and not blooming. what to do? thank you.
Certified GKH Gardening Expert
I suspect that they are getting too much nitrogen. High nitrogen fertilizers, some actually called Bloom Busters, cause the production of more growth of foliage and limited to no blooms. Here is a link to an article I wrote on the subject for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/no-blooms-on-roses.htm Giving them each a cup of Kelp meal and some Super thrive mixed into some water that they are watered with will help get them going. Use an organic or organic based rose fertilizer that is well balanced on the NPK will help alot too.