- Author: Cathy Cromell The National Gardening Association
- Language: English
- Year: 2010
- Author: Ann Whitman The Editors of the National Gardening Association
- Language: English
- Year: 2001
- Author: Cathy Cromell The National Gardening Association
- Language: English
- Year: 2010
- Author: Ann Whitman Suzanne DeJohn The National Gardening Association
- Language: English
- Year: 2009
- Author: Steven A. Frowine The National Gardening Association
- Language: English
- Year: 2007