Kenneth Cox is grandson of planthunter, writer and nurseryman Euan Cox and son of Peter Cox VMH. These three were and are considered the world's leading experts on rhododendrons. Himself a nurseryman, Kenneth is managing director of the family firm Glendoick Gardens Ltd near Perth and author of numerous books, including The Encyclopedia of Rhododendron Hybrids (with Peter A. Cox), A Plantsman's Guide to Rhododendrons, Cox's Guide to Choosing Rhododendrons (with Peter Cox), The Encyclopedia of Rhododendron Species (with Peter Cox), Rhododendrons: a Hamlyn Care Manual and Rhododendrons and Azaleas.
Born in Scotland, Raoul Curtis-Machin developed a passionate interest in gardening from the age of thirteen. With an honours degree in landscape management from Reading University, he became Head Gardener for ICI, then set up his own London-based business, designing gardens for celebrity chefs, rock stars, Crown Arab Princes and business tycoons. He has improved gardens and estates throughout Scotland, the UK, France, and Istanbul. After freelancing for a year, Raoul launched The Northern Garden in 2003, a new glossy magazine specifically aimed at gardening in the cooler northern climate. Raoul is currently Landscape Historian with Historic Scotland. He lives with his family in Fife and is also gardening correspondent for The Herald magazine, and a part-time lecturer in garden design.