Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to figure out when it's possible to plant gayfeather by referring to the USDA zone info for Mandan.

Planting Calendar for Gayfeather

Frost tolerance for gayfeather:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Gayfeather do well in cold which tells us that you can start planting them much earlier than other frost tender plants.

The earliest that you can plant gayfeather in Mandan 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 gayfeather and expect a good harvest is probably August. If you wait any later than that and your gayfeather may not have a chance to really do well. You can get started a few weeks earlier by starting your gayfeather indoors.

Last Frost Date

In Mandan the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -30°F.

Keep in mind that USDA zone info for Mandan may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Mandan it frosts late in the year after May 15 be ready to cover your gayfeather in the event of a 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.