The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant summer savory in Thief River Falls can be determined by using the USDA zone info.

Planting Calendar for Summer Savory

Frost tolerance for summer savory:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Summer Savory tend to make it in some cold which means that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant summer savory in Thief River Falls is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant summer savory and expect a good harvest is probably August. If you wait any later than that and your summer savory may not have a chance to fully mature. You can get started a little bit earlier by starting your summer savory indoors.

Last Frost Date

On average the last frost is on May 15 in Thief River Falls. In the coldest months of winter you should expect an average low temperature of -35°F.

Since the USDA zone info for Thief River Falls is not always accurate the actual date of last frost changes from year to year. Since half of the time in Thief River Falls it frosts late in the year after May 15 be ready to protect your summer savory in the event of a surprise late frost.

USDA Zone Info for Thief River Falls

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-35°F
Highest Expected Low	-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Thief River Falls

You may be interested in your other planting guides for Thief River Falls.