Q.What Are White Spots On My Knock Out Rosebush
It’s not an insect of any kind. the leaves have white spots
GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on April 26, 2021
That sounds like powdery mildew. Here is more:
https://www.gardeningknowhow.com/ornamental/flowers/knockout-roses/knockout-rose-diseases.htm
Was this answer useful?
00