Exotic and late-flowering salvias are the target for Rachel de Thame, Joe Swift and Chris Beardshaw as they embark on a plant-hunting mission. Meanwhile, Alan Titchmarsh visits Yorkshire to meet botanist James Compton.
Series producer Colette Foster ; Executive producer Tony Laryea (S) (W)BBC MAGAZINES: Gardeners' World, price £2.60: Gardens Illustrated, L3.50 Gay Search on the RHS Plant Finder- Gardening: page 22