When Is The Best Time To Start Fertilizing Established Knockout Roses Each Year?

Question

I have read late winter/early spring but I’ve also read to wait until after the first wave of flowering which got me confused

Answer 1

Many gardeners prefer to wait until mid to late Spring. After this, the schedule can be a little confusing. Here is are some articles that will help:

https://www.gardeningknowhow.com/ornamental/flowers/roses/rose-fertilizer.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses/best-rose-fertilizer.htm

https://www.gardeningknowhow.com/ornamental/flowers/roses