One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to determine when it's the best time to plant scarlet runner beans by reviewing the USDA zone info for Williston.

Planting Calendar for Scarlet Runner Beans

Frost tolerance for scarlet runner beans:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant scarlet runner beans until after the last frost has passed because they require warm weather.

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

Last Frost Date

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

Always keep in mind that USDA zone info for Williston is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Williston you get surprised by a frost after May 15 so make sure that you are prepared to cover your scarlet runner beans if you have a surprise late frost.

USDA Zone Info for Williston

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 Williston

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