Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. 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 Berthoud can be reffered to in order to estimate when it's the best time to plant corn.

Planting Calendar for Corn

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

It's probably not a good idea to plant corn until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant corn in Berthoud is April. However, you really should wait until May 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. Any later than that and your corn may not have a chance to really do well. 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 April 15 in Berthoud. It might get as low as -15°F during the coldest months of winter.

Keep in mind that USDA zone info for Berthoud is an average and the actual date of last frost will vary from year to year. Since half of the time in Berthoud you get surprised by a frost after April 15 be ready to cover your corn in the event of a late frost.

USDA Zone Info for Berthoud

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Berthoud

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