‘RHS Encyclopedia of Gardening’ by Christopher Brickell, published by DK
First published 20 years ago, this perennial favourite has been assembled by a team of specialist gardeners who review and update the content each year to reflect modern gardening methods and techniques. It’s a book of two halves – the first section details how to build a garden from the ground up, with the second section focusing on the tricky business of maintaining it. The design may look a bit dated to some, but the info and advice inside is bang on the money, making it the essential reference book for all gardeners, and one which you’ll want (and need) to revisit again and again.