Gold medal winners will receive £500 for a new "premier" gold award to encourage more growers to show. At the same time, a best new plant award will be introduced, also with a £500 prize value. Gold award winners will continue to receive the current £350 prize
Tickets went on sale earlier last month and are selling well, said organiser Martin Dare. The higher prize money could offset fuel bills in driving to Edinburgh, he added.
"Gardening Scotland attracts the cream of the UK's nurseries and growers We have introduced these awards to recognise those exhibitors who create exceptional displays or who use the show to launch brilliant new plants."
Almost 400 exhibitors take part in the show, which attracts 40,000 visitors.