The Vital Role of Tree Diversity

Trees are ever-present in our lives and have enabled us to connect to the natural world. But should we be concerned for our trees with our changing climate and what trees can we plant in our gardens for the future?Tony Kirkham, MBE, British botanist and former Head of Arboretum, Gardens and Horticulture at the Royal Botanic Gardens, Kew, discusses how trees are adapting around the world to climate change and what we can expect to see as our future tree-lined horizon takes on a different shape.

Do you have a gardening question you'd like Alan Titchmarsh's help with? Submit your question in the comments below or go to www.gardenersworld.com/podcast/questions/

Alan will answer a selection in the Ask Alan podcast series from BBC Gardeners' World Magazine in February and March.

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