One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Thief River Falls it's possible to figure out when it's a good idea to plant endive.

Planting Calendar for Endive

Frost tolerance for endive:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Endive are one of those plants that can tolerate a little bit of cold weather which tells us that you can start planting them earlier than other frost tender plants.

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

The last month that you can plant endive and expect a good harvest is probably August. Any later than that and your endive may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your endive indoors.

Last Frost Date

The average date of last frost is May 15 in Thief River Falls. You can expect an average low temperature of -35°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Thief River Falls is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Thief River Falls you get a frost after May 15 so always be ready to protect your endive 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.