One of the first steps you take when you are determining your gardening schedule is find your 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.

The USDA zone info for Mandan should be used to determine when it's a good idea to plant aurinia.

Planting Calendar for Aurinia

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

You can plant aurinia earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

The earliest that you can plant aurinia 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 aurinia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your aurinia may not have a chance to fully mature. If you are starting your aurinia indoors then you might be able to get away with starting them a little bit earlier.

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.

Since the USDA zone info for Mandan is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Mandan last frost occurs after May 15 so make sure that you are prepared to protect your aurinia 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.