My Knockout roses bloom beautifully in June but the subsequent blooms are scarce even though I deadhead them. Will I get a more consistant bloom with shrub roses? I see some rose bushes next to the library in my town that are covered with blooms from June into September (without deadheading!). I asked the lawn maintenance crew what variety of rose they were but they didn't know. Are they shrub roses?
Hmmm -- could it be fertilizer? I put on slow release in the spring, and again in early August. My Knock-0ut roses perform better in blooming than my shrub roses -- here are pics of the Knock-outs in June, July, September, and late October 9 (the 28th.)