English lawns will become a sign of "social and moral decadence" in the next decade as climate change makes it increasingly difficult to maintain traditional gardens, horticulturalists have warned. Professor Geoff Dixon of the University of Reading's Centre for Horticulture and Landscape said temperature rise, droughts and increasing risk of pest and disease over the next century will transform gardens in Britain. In the south of the country it will become difficult to maintain the traditional English garden of rambling roses, lupins and delphiniums by the end of the century. Instead gardeners will have to plant more Mediterranean species such...