According to the USDA International Falls is in USDA Zone 3a. Here is some general info for USDA Zone 3a to help you get started.
| Average Date of Last Frost (spring) | May 15 |
| Average Date of First Frost (fall) | September 15 |
| Lowest Expected Low | -40°F |
| Highest Expected Low | -35°F |
This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.
You can view the USDA Zone map for Minnesota here:
Below is a list of planting guides for International Falls, MN. These guides are based on data from Zone 3a.
Vegetables
Herbs
Flowers