The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant corn in Duluth should be determined by using 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 means that you need to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant corn in Duluth 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 corn and expect a good harvest is probably August. If you wait any later than that and your corn may not have a chance to really do well. You can get started a few weeks earlier by starting your corn indoors.

Last Frost Date

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

It's important to remember that USDA zone info for Duluth may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Duluth you get surprised by a frost after May 15 be ready to cover your corn if you have one of those late frosts.

USDA Zone Info for Duluth

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 Duluth

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