Book excerpt: Growing awareness of the importance of soil health means that microbes are on the minds of even the most casual gardeners. After all, anyone who has ever attempted to plant a thriving patch of flowers or vegetables knows that what you grow is only as good as the soil you grow it in. It is possible to create and maintain rich, dark, crumbly soil that’s teeming with life, using very few inputs and a no-till, no-fertilizer approach. Certified permaculture designer and lifelong gardener Diane Miessler presents the science of soil health in an engaging, entertaining voice geared for the backyard grower. She shares the techniques she has used — including cover crops, constant mulching, and a simple-but-supercharged recipe for compost tea — to transform her own landscape from a roadside dump for broken asphalt to a garden that stops traffic, starting from the ground up.