He has consistently pioneered the use of colour photography for the reliable identification of natural history subjects, and has written numerous books dedicated to this purpose, including Roses and Herbs. Described as “Mr Mushrooms” because of his expertise in the field, Roger has written and presented two major six-part TV series on gardening (BBC & Channel 4). Famed for his ebullient personality and garish red glasses, he has become a well-recognized figure in the world of gardening.