One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant fanflower in Mandan can be estimated by reviewing the USDA zone info.

Planting Calendar for Fanflower

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

It's probably not a good idea to plant fanflower until after the last frost because they are not cold tolerant.

The earliest that you can plant fanflower in Mandan 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. If you wait any later than that and your fanflower may not have a chance to fully mature. If you are starting your fanflower indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Mandan the average date of last frost happens on May 15. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Mandan is an average and the actual date of last frost changes from year to year. Since half of the time in Mandan there is a last frost after May 15 be ready to cover your fanflower in the event of a surprise late frost.

USDA Zone Info for Mandan

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 Mandan

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