Overview: The Beechgrove team is on the road to Dumfries, where Jim, George and Chris discover the origins of horticultural therapy. They also take in the extraordinary rock garden on the Crichton Estate, which was designed and built in the 1920s, as well as visiting a tiny but packed bedding plant garden in nearby Collin. Jim, George and Chris also host a Beechgrove Gardener's Question Time in Dumfries's magnificent Easterbrooke Hall and answer as many questions from the good gardeners of Dumfries as they can