I asked some of my favorite gardeners to share sustainable practices that they employ in their gardens. We get contributions from Linda Vater, Erin Schanen, Julie Hart (Nanny Noo), Amanda the Everhopeful Gardener, Emma Biggs, Marianne Willburn, Bunny Williams and Tasha Greer about what they do (or don't do) in their gardens to make our earth a bit happier.