By James L. Brewster (Horticulture Research International, Wellesbourne, UK)
By Steve Bradley
By Victoria Harrison
By Graham Strong, Alan R. Toogood
By Beth Chatto
By Tony Mace, Suzanne Mace
By Graham A. Pavey
By Dickinson, Becky, Collins Big Cat
By ALLEN J. COOMBES
By Norman Hudson
By Sally Roth
By M.M.Vilmorin- Andrieux
By Kenneth A. Beckett
By David Austin
By Simon Mills
By William Adams, Richard Gibbs (New Zealand Turf Culture Institute)
By Lawrence D. Hills
By Sue Stickland
By Alan Titchmarsh
By Alex Pankhurst
By Roy Genders
By Tyler Whittle, Christopher Cook
By John Evelyn
By Maggie Campbell-Culver