One of the first steps you take when you are making a decision about 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 USDA zone info for Gretna can be read to figure out when it's a good idea to plant corn.

Planting Calendar for Corn

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

It's a bad idea to plant corn until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant corn in Gretna is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant corn and expect a good harvest is probably September. You probably don't want to wait any later than that or else your corn may not have a chance to fully mature. Starting your corn indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in Gretna. You should expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Gretna is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Gretna you get a frost after February 15 be ready to protect your corn in the event of a late frost.

USDA Zone Info for Gretna

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Gretna

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