Garden designer Kate Gould, who has won numerous medals at the RHS Chelsea Flower Show, will help Gardening Leave launch a new garden and raise its profile in the horticulture world.
The charity was started by Anna Baker-Cresswell in 2007 to offer horticultural therapy to ex-service personnel in walled gardens. These are currently based at Auchincruive in Ayrshire and Erskine on the Clyde. Work has recently begun on a third site at the Royal Hospital Chelsea in London.
Baker-Creswell said: "Gardening Leave improves the mental and physical well-being of veterans through horticultural therapy by giving them structure, routine and exercise.
"The veterans enjoy being with like-minded people, being outside and having something to do in a safe, peaceful environment."