Monty Don gives advice on how to cut and maintain hedges as well as ideas on growing fruit in pots, while Adam Frost uncovers the secrets of successful planting combinations in an Oxfordshire garden. Carol Klein chooses varieties of late flowering clematis as her plant of the month, Nick Bailey travels to the southern tip of Cornwall to seek out a plant which escaped from our gardens and is now threatening rare and native plants, and Mark Lane joins the enthusiasts who have lovingly restored a walled garden in Warwick.