Rose Canker. Please help identify the problem

Meghan Betts

I believe my knock out roses have canker really bad. They are all still starting to grow this spring but the canes almost look like zebra stripes all the way down to the base. I'm not sure how to proceed or if they can be saved? I'm new to roses and these are 3 years old. I'm sure the problem began way before I realized what it was. I've been properly reading on care as of recently. I just assumed knockout roses were an easy plant as everyone in the area seems to have an abundance of them in their landscaping. Zone 6b. The light tan stuff is fertilizer I was working into the soil just as an FYI and not rot.

Browse Gardening and Landscaping Stories on Houzz See all Stories
Decorating Guides Got a Problem? 5 Design Trends That Could Help
These popular looks can help you hide your TV, find a fresh tile style and more
Full Story
Landscape Design Fire-Wise Landscapes Can Help Keep Your Home and Property Safe
Choose fire-resistant plants and materials and create defensible areas using these design strategies
Full Story
Small Spaces 5 Solutions to Small-Bathroom Problems
Whether your room lacks a separate shower, adequate storage or a sense of spaciousness, there are remedies at hand
Full Story
A shared philosophy of giving back is what motivates the talented team at Purple Cherry Architects. Our work is... Read More