How do perfume-makers capture scents? What makes plants release their fragrances? And which of them smell the best in the garden? Carol Klein investigates as she meets breeders and growers who are realising that gardeners want more than disease-free blooms. Producer Patty Kraus ; Series producer Sarah Moors RT DIRECT: save E2 on Gardeners' World - Gardening from Berryfields. To order for E18 including p&p. call [number removed]7979 (national rate) Alan Titchmarsh 's 30 Minute Gardener: page 37; Amaryllis belladonna and border penstemons offers: page 38