The USDA Zone info is a great tool for gardeners to help us estimate 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.

In Grand Forks you can determine when it's a good idea to plant snap beans by using the USDA zone info.

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 when the weather gets warmer because they require warm weather.

The earliest that you can plant snap beans in Grand Forks 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. Any later than that and your snap beans may not have a chance to really do well. You can get started a little bit earlier by starting your snap beans indoors.

Last Frost Date

On average the last frost is on May 15 in Grand Forks. It might get as low as -30°F during the coldest months of winter.

Keep in mind that USDA zone info for Grand Forks is not always accurate and the actual date of last frost changes from year to year. Half of the time in Grand Forks there is a last frost after May 15 so just be sure to be ready to cover your snap beans in the event of one of those late frosts.

USDA Zone Info for Grand Forks

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 Grand Forks

You may be interested in your other planting guides for Grand Forks.