One of the first steps you take when you are estimating 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.

A common way of getting a good idea when it's the best time to plant corn is to use the USDA zone info for Zimmerman.

Planting Calendar for Corn

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

Since corn do not do well in cold weather it is important to wait until after the last frost before you can plant them.

The earliest that you can plant corn in Zimmerman 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 fully mature. You can get started a little bit earlier by starting your corn indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Zimmerman. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Zimmerman is an average and the actual date of last frost will vary from year to year. Since half of the time in Zimmerman last frost occurs after May 15 be ready to cover your corn in the event of a surprise late frost.

USDA Zone Info for Zimmerman

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 Zimmerman

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