Frances Tophill is at Powderham Castle in Devon. She spends the day there with her good friend Jeanette, who has been transforming part of the walled garden into a productive growing space. As well as planting raspberries, fruit trees and climbing beans, Frances adds colour to an ornamental border and shares tips for growing herbs in containers. Toby Buckland explores the quintessentially English gardens at Wollerton Old Hall in Shropshire. He revels in its sumptuous planting, especially the undisputed stars of the summer border, the delphinium. Rekha Mistry takes us to the Inner Temple Gardens in London. It's a place close to her heart and where she first discovered the joys of ornamental planting. An expert grower in Surrey demonstrates the wonder and artistry of bonsai. And there's a couple in Lancashire who have created an inventive and beautiful garden in a challenging space.