One of the first steps you take when you are making a decision about 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.

One way of making a decision about when to plant nicotiana is to examine the USDA zone info for Thief River Falls.

Planting Calendar for Nicotiana

Frost tolerance for nicotiana:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's a bad idea to plant nicotiana until after all chance of frost has passed because they require warm weather.

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

The last month that you can plant nicotiana and expect a good harvest is probably August. You probably don't want to wait any later than that or else your nicotiana may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your nicotiana indoors.

Last Frost Date

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

Since the USDA zone info for Thief River Falls is just an average 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 be sure to be ready to cover your nicotiana if you have a 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.