Turnips, there is also a turnip variety called Seven Top which you only harvest the greens, radishes, red beets, collard greens, Swiss chard, mustard greens, broccoli, cauliflower, cabbage, peas, kale, spinach, carrots.
There are probably more. These are just the ones I know. I plan to build some cold frames to keep lettuce going too.
Edit: if you can get your hands on seed potatoes you can plant them 100 days before the typical first frost. I’m thinking in hotter climates the fall potatoes might actually be better. Getting seed potatoes past spring seems to be a challenge.
Turnips, there is also a turnip variety called Seven Top which you only harvest the greens, radishes, red beets, collard greens, Swiss chard, mustard greens, broccoli, cauliflower, cabbage, peas, kale, spinach, carrots.
There are probably more. These are just the ones I know. I plan to build some cold frames to keep lettuce going too.