Here is some general info for USDA zone 6a to help you get started.
Average Date of Last Frost (spring) | April 15 |
Average Date of First Frost (fall) | October 15 |
Lowest Expected Low | -10°F |
Highest Expected Low | -5°F |
This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.
Below is a list of planting guides for Zone 6a.
Vegetables
Herbs
Flowers