The team celebrates the joy that gardens and gardening can bring by looking back at some of their seasonal highlights. Monty Don harvests tomatoes from the greenhouse and plants out some of his favourite flowers for long-lasting summer colour, heleniums. Carol Klein pays an inspirational trip to an early summer garden in Wiltshire, Toby Buckland meets a passionate gardener in Devon who has created and nurtured her garden over the last 60 years, and Rachel de Thame visits the garden of hairstylist Sam McKnight. There's also a young gardener in Cumbria with a passion for dahlias and a dedicated grower whose allotment is towering with structural plants, as well as another look at films from viewers' own gardens.