When can I plant String beans in Zone 1a

Before planting it is a good idea to find our USDA Zone info to figure out our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

It's a good idea to figure out when to plant string beans by reviewing the USDA zone info for Zone 1a.


Planting Calendar for String beans

Frost tolerance for string beans: Not tolerant of frost.
When you should plant them: After the last frost has passed.

String beans are not cold tolerant which tells us that it is important to wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant string 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 string beans and expect a good harvest is probably July. Any later than that and your string beans may not have a chance to really do well. Starting your string beans indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on June 15 in Zone 1a. We should expect an average low temperature of -60°F in the coldest months of winter.

Since the USDA zone info for Zone 1a may not be accurate from year to year our actual date of last frost changes from year to year. Half of the time in Zone 1a last frost occurs after June 15 so be sure to be ready to cover your string beans in the event of a surprise late frost.

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.