Celebrity speakers Adam Frost and Pippa Greenwood will appear and there are more than 100 plant nurseries, arts and crafts, local food, live music and entertainment. Jim Buttress is also a guest and plant societies and garden clubs are particularly welcomed with group discounts and sale or return tickets.
Buckland said: "I’m thrilled to announce the dates for our fourth festival at Powderham and once again we have a fresh line-up of exhibitors and interactive displays, designed to inspire and entertain the region’s gardeners. We have even more special and unusual plants, as well as a new Garden Pest Clinic where we will be show-casing up-to-the-minute, eco-friendly techniques for dealing with pests and diseases. This year we’re doing even more to celebrate the wealth of independent growers and makers with our new ‘Devon Made’ expo and we have our Curious Corner, a place for gardeners young and old to explore the fascinating world of wildlife, Nature and the great outdoors.
"Also for 2017 we’re introducing The Chill & Grill Yurt where you can savour the taste of summer and learn to cook more than just bangers and burgers – a must for the alpha outdoor-chef in your family."
Buckland said new BBC Gardeners’ World presenter Frost "is widely tipped to be the nation’s next head gardener".