Knock out roses, long-blooming shrub roses that are resistant to black spot disease, have roots that are initially approximately 8 inches to 10 inches long.
About this Author
Sandy Mitchell is an Ohio-based writer, blogger and editor. Among other projects, she writes for About.com and "The Better Drink." Before devoting herself full-time to writing, Sandy was a travel agent and cruise school instructor for 18 years. Sandy holds a Bachelors of Science in business administration from Bowling Green State University.