This episode sees the first of eight hour-long episodes of Gardeners' World. Monty and the regular team are joined by some new faces offering tips, advice and inspiration from gardens large and small across the country. In this programme, Monty is at Longmeadow catching up with some seasonal jobs, and he also gets out and about for an inspiring visit to the longest herbaceous border in the world. Seven-time Chelsea gold medal-winning designer Adam Frost lays out plans for his new garden in Lincolnshire, while newcomer Flo Headlam visits a small city front garden in Liverpool to get underway with her mission to green up Britain's grey spaces. Nick Macer will be in Sheffield, exploring the ways in which Britain's climatic conditions can be exploited for growing some surprising plants, and Carol Klein is in Devon, getting to grips with some of the members of the extraordinary buttercup family, which include clematis and delphiniums.