Overview: This episode comes from the biggest horticultural event in the north – the RHS Flower Show Tatton Park. Joe Swift and Frances Tophill reveal the latest in garden design, as well as bringing plant perfection from some of the best nurseries and growers in the country. Joe shows us how to turn the smallest of spaces into a green haven, and Frances looks at the best plants to cater for nocturnal pollinators. Also, Nick Bailey shines a botanical spotlight on begonias, and Toby Buckland visits a community in Liverpool who have regenerated their streets through collective gardening.