When to Plant Corn in Zone 1a

One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant corn in Zone 1a can be determined by reviewing the USDA zone info.


Planting Calendar for Corn

Frost tolerance for corn: Not tolerant of frost.
When to plant: After the last frost.

Corn do not do well in cold weather which tells us that you have to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

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

The earliest that you can plant corn 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 corn and expect a good harvest is probably July. You probably don't want to wait any later than that or else your corn may not have a chance to really do well. If you are starting your corn indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is June 15 in Zone 1a. It might get as low as -60°F during the coldest months of winter.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 1a and it changes from year to year. Half of the time in Zone 1a it frosts late in the year after June 15 so make sure that you are prepared to cover your corn if you have 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 your other planting guides for Zone 1a.