Mixed greens can be grown pretty much anywhere, even on a windowsill. Lettuce is a cool-weather crop and can be grown in both spring and fall. It doesn’t mind being crowded, so grab a pot, and sprinkle those seeds in generously. Thin the crop out when some leaves are big enough to eat, then continue to snip leaves as needed until the plants bolt—send up flower stalks. If you’re feeling ambitious, save some of those seeds for next season.