One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for International Falls you will be able to estimate when you can plant fanflower.

Planting Calendar for Fanflower

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

Fanflower require warm weather which means that you really should wait until it warms up after the last frost before you can plant them.

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

Last Frost Date

In International Falls the average date of last frost happens on May 15. It might get as low as -40°F during the coldest months of winter.

Since the USDA zone info for International Falls may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in International Falls it frosts late in the year after May 15 be ready to cover your fanflower in the event of a surprise late frost.

USDA Zone Info for International Falls

Here is the info for USDA Zone 3a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-40°F
Highest Expected Low	-35°F

This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.

Plants to Grow in International Falls

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