, Fred Loads, Tom Clark and Dr E.W.Sansome. Professor Alan Gemmell joined Loads and Sowerbutts in 1950 when their contrasting styles (Professor, Traditional Head gardener and Commercial Grower) added an entertainment element. The successful format allowed it to broadcast nationally from 1957 in the light entertainment slot on Sunday afternoons. The programme marked its 1000th edition in 1972, though the occasion was overshadowed by the death of long-serving chairman Franklin Engelmann just days earlier. A traumatic change occurred in 1994 when the complete panel left the BBC following the clumsy handling of their contracts by the incoming independent production company and they moved to the new Classic FM station on a short-term contract as 'Classic Gardening Forum' with sponsorship by Cheltenham and Gloucester. A new team, style changes, a more flippant approach and format developments since 1994 have seen GQT lose some of its traditional audience who miss the informed banter between knowledgeable horticulturists with distinctive voices.
Since 2001, GQT factsheets have been made available after each episode covering all questions and their answers given.
Past participants have included Dr Stefan Buczacki, David Burges, Fred Downham, Professor Alan Gemmell, Walter Gilmore, Jill Hicking, Clay Jones, Nigel Colborn, Daphne Ledward, Fred Loads, Bridget Moody, Martin Fish, David Jones, Sue Phillipps, Geoffrey Smith, Sid Robertson, Bill Sowerbutts
Past Chairmen were Bob Stead, Franklin Engelmann, Michael Barrett, Steve Race, Ken Ford, Les Cottingham, Clay Jones, Stefan Buczacki