Q.knock out roses
A service I have does deep root fertilization 3 times during the growing season on all of my shrubs, etc. Should I be using other special rose supplements for my roses as well?

Downtoearthdigs
Answered on May 9, 2019
This article will help you.
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/care-knockout-roses.htm
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