Monty Don adds plants that give shelter to insects and invertebrates to his wildlife pond, plants up a summer display in a pot and gives tips on planting celery. From her garden in Devon, Carol Klein gives a comprehensive guide to getting plants for free, turning her attention to climbers like honeysuckle and clematis. In Brighton, cameras return to Kate Bradbury's garden to see how the once barren plot is being used by wildlife. Plus, from the archives, Rachel de Thame's visit to Gloucestershire's Kiftsgate Court Gardens, where she heard about the three generations of female gardeners who have made their mark there.

Adam Frost brings viewers up-to-date on how his garden has been developing over the summer as well as offering advice on looking after and growing hydrangeas. In Devon, Toby Buckland shares tips on dealing with damaged shrubs, tree pruning and transplanting perennials, while Frances Tophill travels to West Sussex to meet a gardener and professor of biology whose garden has been planted with the conservation of insects in mind. Plus, a second chance to see Carol Klein's in-depth profile of a national collection of hydrangeas at Darley Park in Derby.