One of the first steps you take when you are estimating 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 you should be able to estimate when it's the best time to plant lenten rose.

Planting Calendar for Lenten Rose

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

Lenten Rose tend to make it in some cold which means that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant lenten rose 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 lenten rose and expect a good harvest is probably August. You probably don't want to wait any later than that or else your lenten rose may not have a chance to really do well. You can get started a little bit earlier by starting your lenten rose indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Thief River Falls. You can expect an average low temperature of -35°F in the coldest months of winter.

Remember that USDA zone info for Thief River Falls is not always accurate and the actual date of last frost is different every year. Half of the time in Thief River Falls last frost occurs after May 15 so make sure that you are ready to protect your lenten rose in the event of 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.