By Coult, D.A.
By Paul Sterry
By Anne H. Lindsey
By Fitter. Richard and Fitter. Alastair.
By Ary, S., Gregory, Mary, Nicholson, B. E.
By Michael Scott
By Keith R. West
By Roy Lancaster
By Jennifer Potter
By Georgianna Lane
By Michael Chinery
By Rose, Francis
By Richard Bird, National Trust Books
By John Manning
By Roger Phillips, Sheila Grant, Tom Wellsted
By Jane McGary, North American Rock Garden Society
By Brian Vesey-Fitzgerald, Rowland Hilder, Edith Hilder
By Humphries, C.J.
By Royal Horticultural Society (DK Rights) (DK IPL)
By Endersby, Jim
By Hannickel, Erica
By Bradshaw, Margaret E.
By Richard Mabey, Mabey, Richard
By Doney, Meryl, Tanner, Suzy-Jane
By Howard, Judy
By Martin, W.Keble
By Phillips, Roger, Grant, Sheila, Wellsted, Tom
By Burgess, Claire, van Veldhoven, Marijke
By Wright Michael
By Dr. D.G. Hessayon