When can I plant Runner beans in Zone 1a

One of the best tools that we have as gardeners to help us estimate our 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 our area.

The USDA zone info for Zone 1a can be used to figure out when it's possible to plant runner beans.


Planting Calendar for Runner beans

Frost tolerance for runner beans: Not tolerant of frost.
When you should plant them: After all chance of frost has passed.

It's a bad idea to plant runner beans until after the last frost because they require warm weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant runner beans
Possibly ok, but a risky time to plant runner beans
Probably not a good time to plant runner beans

The earliest that you can plant runner beans in Zone 1a is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant runner beans and expect a good harvest is probably July. If you wait any later than that and your runner beans may not have a chance to really do well. You can get started a couple of weeks earlier by starting your runner beans indoors.

Last Frost Date

The average date of last frost is June 15 in Zone 1a. In the coldest months of winter we should expect an average low temperature of -60°F.

Just be sure to remember that USDA zone info for Zone 1a may not be accurate from year to year and our actual date of last frost is different every year. Since half of the time in Zone 1a we get surprised by a frost after June 15 be ready to protect your runner beans if we have one of those late frosts.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.