This is an informative article about planting a fall garden. If you haven’t already, it’s not too late to put out some lettuce, etc.! There is time before the frost still. Some plants, like broccoli, can survive light frosts & if you’ve left them in the ground & cut of the blooms, they may start producing again – this has happened for me anyways. This year the timing did not work to pull them & start new plants for the fall.
Lillies can also be planted in the fall if it’s at least three weeks before the first frost. https://www.almanac.com/plant/lilies