Better Homes & Gardens Gardening Made Simple: The Complete Step-By-Step Guide to Gardening [Paperback] – Perfect for Beginners, Urban Gardeners & Home Landscaping Projects

Hubby is the gardener and has been doing it for a long time, but when I suggested this book, he said there's always something to learn. He must have been right because he takes it to work to read on breaks. Easy to understand and lots of illustrations/pictures.