Applying compost to knockout roses
when should I apply compost to knockout roses?
Anne Arundel County Maryland
If you are referring to a top dressing, you can apply an inch or two around the base of the plant in the fall or spring. Here is more information on Knockout Roses http://extension.umd.edu/hgic/rose-rosenot-always-look-%E2%80%98knock-out%E2%80%99-landscape-roses