The USDA Zone info is a great tool for gardeners to help us determine your gardening 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 figuring out when it's the best time to plant snap beans is to use the USDA zone info for Owatonna.

Planting Calendar for Snap beans

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

It's a bad idea to plant snap beans until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant snap beans in Owatonna 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 snap beans and expect a good harvest is probably August. You probably don't want to wait any later than that or else your snap beans may not have a chance to really do well. Starting your snap beans indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Owatonna the average date of last frost happens on May 15. In the coldest months of winter you can expect an average low temperature of -25°F.

Since the USDA zone info for Owatonna is just an average the actual date of last frost changes from year to year. Half of the time in Owatonna you get surprised by a frost after May 15 so always be ready to cover your snap beans if you have a late frost.

USDA Zone Info for Owatonna

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Owatonna

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