The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to estimate when it's the best time to plant dahlberg daisy by referring to the USDA zone info for Thief River Falls.

Planting Calendar for Dahlberg Daisy

Frost tolerance for dahlberg daisy:	Not tolerant of frost.
When to plant:	After the last frost.

It's a bad idea to plant dahlberg daisy until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant dahlberg daisy 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 dahlberg daisy and expect a good harvest is probably August. Any later than that and your dahlberg daisy may not have a chance to fully mature. If you are starting your dahlberg daisy indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Thief River Falls the average date of last frost happens on May 15. In the coldest months of winter you can 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 is different every year. Half of the time in Thief River Falls you get surprised by a frost after May 15 so make sure that you are ready to protect your dahlberg daisy if you have one of those late frosts.

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.