
Certified GKH Gardening Expert
Your hardiness zone, according to the USDA hardiness zone map, is Zone 7a : 0 to 5 F (-17.8 to -15 C)
That means that the plants you leave outside past the first frost date for your area must be able to tolerate temperatures as low as 0 to 5 degrees F (-17.8 to -15 C).
So none of your annuals can be left out over the winter, for example. When you buy a plant, the plant tag shows its hardiness zone. You also can look the plant up on the Internet and you should be able to find info about the plant, including its hardiness zone.
https://www.gardeningknowhow.com/planting-zones/usda-planting-zone-map.htm