Here is some general info for USDA zone 1a to help you get started.
| Average Date of Last Frost (spring) | June 15 |
| Average Date of First Frost (fall) | July 15 |
| Lowest Expected Low | -60°F |
| Highest Expected Low | -55°F |
This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.
Below is a list of planting guides for Zone 1a.
Vegetables
Herbs
Flowers