Frances Tophill and the team celebrate the joy that the gardening year brings throughout the seasons. Frances is at Wildside Garden in Devon, inspired to make the winter gardens sparkle and do jobs to get them ready for next spring. Nick Bailey visits a garden in Bedfordshire that blends soft grasses with textural trees and crisp topiary to create a space full of winter interest. Advolly Richmond reveals the fascinating history of greenhouses along with the enormous challenges involved in engineering those early designs. Adam Frost gets stuck into some winter jobs, including chitting potatoes and planting up a container for seasonal interest. In Northamptonshire, there's a collection of snowdrops with more than 650 varieties, and there's a man from Somerset whose world has been rocked by lithops - also known as living stones.