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.