Monty expands the planting on the mound, gathers self-sown seedlings and prepares for a summer display in the cottage garden. After a long wet spring, it's finally time to get some seeds sown in the veg garden. Nick Bailey travels to Devon to explore a stunning garden that combines historic charm with modern design. And Arit Anderson visits Sarah Raven to discover her new dahlias, perfect for pollinators. There's an allotment gardener in North Yorkshire whose plot has become a sanctuary, and a visit to award-winning nurserywoman Derry Watkins to explore her garden and reveal her return to the RHS Chelsea Flower Show after an absence of 25 years.