According to the USDA Ogdensburg is in USDA Zone 4b. Here is some general info for USDA Zone 4b to help you get started.
| Average Date of Last Frost (spring) | May 15 |
| Average Date of First Frost (fall) | September 15 |
| Lowest Expected Low | -25°F |
| Highest Expected Low | -20°F |
This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.
You can view the USDA Zone map for New York here:
Below is a list of planting guides for Ogdensburg, NY. These guides are based on data from Zone 4b.
Vegetables
Herbs
Flowers