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

You should be able to determine when you can plant pumpkins by looking at the USDA zone info for Commerce City.

Planting Calendar for Pumpkins

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

It's a bad idea to plant pumpkins until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant pumpkins in Commerce City 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 pumpkins and expect a good harvest is probably August. Any later than that and your pumpkins may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your pumpkins indoors.

Last Frost Date

The average date of last frost is April 15 in Commerce City. You should expect an average low temperature of -15°F in the coldest months of winter.

Always keep in mind that USDA zone info for Commerce City is not always accurate and the actual date of last frost changes from year to year. Half of the time in Commerce City it frosts late in the year after April 15 so make sure that you are prepared to cover your pumpkins if you have a late frost.

USDA Zone Info for Commerce City

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 Commerce City

You may be interested in your other planting guides for Commerce City.