Before planting it is a good idea to find your USDA Zone info to estimate 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.

The earliest that you can plant pole beans in Marshalltown should be determined by checking out the USDA zone info.

Planting Calendar for Pole beans

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

You can not plant pole beans until after the last frost because they do not do well in cold weather.

The earliest that you can plant pole beans in Marshalltown is April. However, you really should wait until May 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. Starting your pole beans indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Marshalltown. In the coldest months of winter you should expect an average low temperature of -20°F.

Since the USDA zone info for Marshalltown is an average the actual date of last frost is different every year. Since half of the time in Marshalltown you get a frost after April 15 be ready to cover your pole beans in the event of one of those late frosts.

USDA Zone Info for Marshalltown

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Marshalltown

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