What's wrong with my Double Knockout roses

8 years ago

Hello everyone,

I have 2 double KOs which are around 3 years old. Every summer right after first bloom, my plants start looking terrible. I end up with holes on the leaves as if something is munching on them. Also, I get these light brown spots on them. I recently realized that one of the plants has 3 sucker canes. These sucker have grown up to the same height as the parent plant. Should I wait till fall to cut them down or can I do it now? Please let me know what's causing my leaves to brown. We had cool weather here in VA last few weeks and it's going to be in the 90s this week. Thanks a lot!

PS: Pics attached

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