One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant sweet corn in Urbandale should be determined by looking at the USDA zone info.

Planting Calendar for Sweet corn

Frost tolerance for sweet corn:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Sweet corn do ok in moderate cold which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant sweet corn in Urbandale 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 sweet corn and expect a good harvest is probably August. Any later than that and your sweet corn may not have a chance to really do well. You can get started a little bit earlier by starting your sweet corn indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Urbandale. In the coldest months of winter you can expect an average low temperature of -20°F.

Always keep in mind that USDA zone info for Urbandale is an average and the actual date of last frost will vary from year to year. Since half of the time in Urbandale it frosts late in the year after April 15 be ready to protect your sweet corn in the event of one of those late frosts.

USDA Zone Info for Urbandale

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Urbandale

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