I don't have a green thumb. Actually, we can't really be sure if that's even true. To test it, I would have to do some gardening...which I don't. But I know some gardeners. I know some people who love it. My mother-in-law can pick up a stick in the yard, jab it into the ground, and in a year, it'll be some flowering bush. My wife's love for gardening is, therefore, perfectly understandable.
Gardening is serious business. Just consider all the work that goes into cultivating a nice, healthy, lush garden.