My Knockout Roses Look Terrible . If you do this the knock out will reward you with consistent color year around. Most popular 9 real ways you can help after a house fire. Can you help my terrible looking Knock Outs? from www.houzz.com I have roughly 2 dozen knockout rose bushes that i planted around 3 sides of my house. Indeed, there are organic products that will kill you or are completely ineffective, or will kill bees. The first 2 seasons they grew like weeds and looked great.