Explore our floral extravaganza at RHS Garden Wisley, with spectacular displays, specialist nurseries, fabulous shopping and much more. The National Dahlia Society Show will happen on 2 & 3 September, with A Celebration of Dahlias occurring on 4 – 6 September. Visitors may enter the Visitors Dahlia competition on 5 & 6 September and all details will be on the website. Included in normal garden admission.