I admire green thumbs. Truly, I do. There's something about most people who are good with plants that just makes them seem more mature, more put together. Like they could maybe handle raising a family, or changing a tire. Then there are my friends who are good with plants. While their apartments may seem pristine, and their grow lights state of the art, some of them can barely afford or use their brain cells to feed themselves. They exist on Clif bars and ramen, while pouring their hard-earned…