The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Duluth it's a good idea to estimate when it's possible to plant fanflower.

Planting Calendar for Fanflower

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

It's not a good idea to plant fanflower until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant fanflower in Duluth 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. Any later than that and your fanflower may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your fanflower indoors.

Last Frost Date

On average the last frost is on May 15 in Duluth. It might get as low as -30°F during the coldest months of winter.

Remember that USDA zone info for Duluth is an average and the actual date of last frost is different every year. Half of the time in Duluth you get surprised by a frost after May 15 so just be sure to be ready to cover your fanflower if you have a surprise late frost.

USDA Zone Info for Duluth

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Duluth

You may be interested in your other planting guides for Duluth.