[Tilted Irish Kilt]

trisham :" We’ve already had two frosts."

Were they killing frosts , or "hoar fost"
Killing frost (below 31 degrees for a lenght of time)will kill all vegetation.
"Hoar frost" is frost crystals on leaves , but plants may survive.
Cloche or cold frames plantings will still survive.
Try to extend your season through innovation, micro-climate , and possible error - the process of learning !
You still have a number of days of warm weather.. at least 10 days to get a fall garden in..
Limit your losses , but stretch yourself out !!
You are at least two temperature zones warmer than me, and I am still planting .
Farmers - the worlds first gamblers, who try to defy "mother nature", by bringing in a crop when other say you can't !!

[trisham]

We had “hoar frosts”, but most of our plants are gone, except for the parsley and a few tomato plants, all of which are on the deck. The parsley may overwinter for us, especially given that it is about 12 feet off of the ground, on the south side of the house. Our sage may overwinter as well, being in close proximity to the parsley.

We usually have 3 to 4 feet of snow on the ground all winter, with temps as low as 15 to 20 degrees below zero some years.