Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of making a decision about when it's possible to plant pole beans is to check out the USDA zone info for Mandan.

Planting Calendar for Pole beans

Frost tolerance for pole beans:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Pole beans require warm weather which means that it is necessary to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant pole beans 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 pole beans and expect a good harvest is probably August. Any later than that and your pole beans may not have a chance to really do well. You can get started a couple of weeks earlier by starting your pole beans indoors.

Last Frost Date

On average the last frost has passed is on May 15 in Mandan. You can expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Mandan is just an average the actual date of last frost will vary from year to year. Half of the time in Mandan last frost occurs after May 15 so make sure that you are ready to protect your pole beans in the event of one of those late frosts.

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.