Every gardener has a story about something they planted for someone else. Sometimes it’s a row of sunflowers, sometimes a pot of herbs, sometimes a single dollar. And the time spent in the soil may help the gardener, too. In a study published in the Journal of Health Psychology, gardeners who did 30 minutes of gardening after a stressful task saw their stress hormone cortisol drop more than people who spent the same time reading, and their good mood came all the way back. From a $1 row of sunflowers that was never really rent to a pizza garden planted for a retirement home, these stories show how this hobby turns kindness into happiness.