The 15 medals from Hampton Court included five golds. Selina Botham won for best small garden (HW, 17 July). Sarah Eberle, Sim Flemons, Ivan Tucker and Helen Williams also scooped golds.
Six silver-gilt gongs went to Kari Beardsell, Sally Court, Andrea Fawcett-Philippart, Andrew Marson, Amanda Patton and Anita Smith.
Silver medals went to Mair Elli and Caragh Walsh, and bronzes to Catherine Kenny and Sadie Stowell. Bella D'Arcy won a certificate of merit.
Meanwhile, the RHS Chelsea Flower Show in May saw 13 medals won by SGD members including seven golds for Adam Frost, Sue Hayward and Thomas Hoblyn.
Arabella Lennox-Boyd, Philip Nixon, Andy Sturgeon and Cleve West also won golds. Silver-gilt medals went to Paul Hensey and Victoria Mills.
Three silver-medal winners were Ian Dexter, Alison Lloyd and Philip Nash, and bronze medals went to Angela Potter and Ann Robinson.