This week's episode comes from Adam Frost's garden.Arit Anderson discovers a paradise garden in Cambridge which has become a focal point for the local community, and Frances Tophill shares the joy of collecting and saving heirloom vegetable seeds on a visit to Pembrokeshire.There's a passionate grower in Somerset who has a unique take on companion planting in his productive plot, and in Wolverhampton there's a gardener who, through clever design and planting, has transformed a long narrow plot into a magical space to get lost in. Also, more Gardeners' World viewers share what they've been getting up to in their gardens.