Frosty full moon

In the north country a full moon in September can mean a hard frost. That will mean most of your garden will not continue on, unless you cover the items you want to save. Carrots, brocolli, cabbage, kale, cauliflower and hardier items will survive for a bit longer, but not tomatoes, cucumbers, beans, summer squash, zuchinni and other tender plants. They will die with a hard frost, some like tomatoes might survive a light frost, one or two degrees below 32.
If you do have a frost and awake before daylight, turn the water on the items, otherwise cover them.

If you find that your garden is full of green Tomatoes, and a frost is imminent, pick them and throw them in a bag with an apple to ripen. Apples release ethylene, a ripening agent that will speed up the process. However, once picked, the Tomatoes will no longer produce sugars, so even when they ripen off the vine, they will not taste as good as fresh picked vine ripened Tomatoes.

Frost does not help the flavor of squashes contrary to popular belief. Frost does however improve the flavour of Kale. You can 'over-winter' your Kale and harvest it when the snow has it covered by a foot or so. It will taste just as good. Brussel sprouts are another crop you can leave and eat and enjoy all winter right from the garden. You may need to use snow shoes to harvest them though, but the rewards will be worth it.