This comprehensive book covers all aspects of protected horticulture. It discusses the appropriate setting for a greenhouse enterprise, and covers greenhouse design principles and commercial glasshouses. It also considers cladding materials, the development and use of polythene-clad tunnel structures, and greenhouse energy sources. The greenhouse environment, growing rooms, irrigation, composts, and other growing media are examined as well as plant nutrients, fertilizers, pest and disease control, nursery hygiene, and much more. About the Author Thady Barrett is was a senior lecturer in commercial horticulture for 20 years. He is now a horticultural consultant and provides practical and technical advice to small and medium-sized ornamental plant nurseries.