Knock Out rose root depth varies due to soil density and plant age. Knock Out roses begin in an 8- to 10-inch-deep hole with a spread of at least 24 inches. As the bush grows, the anchor roots reach farther into the soil to establish support. Watering to a depth of 24 inches is often sufficient to reach the majority of roots.
About this Author
Deborah Waltenburg has been a freelance writer since 2002. In addition to her work for Demand Studios, Waltenburg has written for websites such as Freelance Writerville and Constant Content, and has worked as a ghostwriter for travel/tourism websites and numerous financial/debt reduction blogs.