Have you ever wondered how earthworms work? Or why some trees are so big? This book offers expert answers to the questions many a gardener has asked or never thought to ask. Packed with photographs, beautiful vintage engravings, and insightful diagrams, everything from the practical to the slightly maddening to the perplexing question is answered. Experience boxes provide practical guidance so you can apply your new found knowledge to your own garden straight away. Written by the Chief Gardener of the Royal Horticultural Society (the British Royal Horticultural Society), this book is the ideal gift for curious gardeners with a sense of humour.