Special thanks must be given to several persons who lent their considerable experience; much of their verbal communication was synthesized in this publication.
- Marie Caillet of Dallas
- Rosa Finsley of Kings Creek Nursery in Cedar Hill
- Dr. W. Clyde Ikins of Lakeside Gardens, Bandera, Texas
- Dr. Kirk Strawn of College Station, Texas
- Bob Webster of Shades of Green Nursery in San Antonio, Texas.