David Maxwell escapes the winter chill and starts the New Year in Belfast's Botanic Gardens with expert guests. Colin Agnew sells the virtues of winter cherries in the cool wing of the Victorian Palm House, Adrienne Armstrong gives David and update on the Tropical Ravine two years after its major renovation and David explores a new medicinal garden with Gardeners' Corner regular Barbara Pilcher. Also in the programme, protecting exotic plants outdoors this winter with Conrad McCormick.