In Gardeners' Corner this week, David Maxwell visits Helen Dillon's new garden by the sea and finds out why the plants are looking so happy and thriving within her walled garden. Also in the programme Helen Mark visits Sir Bob and Rosemary Salisbury's wildlife friendly garden in Co. Tyrone and enjoys an autumn walk through the many shrubs and trees providing a blaze of colour. Jimi Blake at Huntingbrooke Gardens in Co. Wicklow shows David his collection of salvias and dahlias and talks about jobs for the autumn garden.