Admittedly, I don't have much of a green thumb. Actually, it's quite the opposite. Anything that comes into my care tends to die. For this reason I was never allowed to babysit when I was growing up. It's probably for the best, even though now, possibly as a consequence, I am completely devoid of maternal instinct or knowledge of childcare. Also, probably for the best. I don't plan on needing or acquiring that knowledge or instinct at any time. ever.
I do, however have a vegetable garden (saved from my mother's similar tendency to kill things. only she's in denial about it.). This year's endeavors include string beans, spinach, chives, eggplant, and tomatoes. beans and tomatoes are there every year, and so are the chives (perennial), but the spinach and eggplant are new this year. the spinach is doing ok, though having difficulty with a parasite problem - lots of holey leaves, and the eggplant i don't really have high expectations for. Which is unfortunate because i had hope to make homemade eggplant parm. at one point with S. (recipe from TDP, of course.)
Above, i recently planted a batch of cilantro, [sweet] basil, and parsley. I have a group indoors and outdoors to kind of see which one fares better. Overall, I have better luck with vegetables than flowers, so that's why my garden is almost exclusively edible.