When to Plant Pumpkins in Willowbrook, IL

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.

In Willowbrook you can determine when to plant pumpkins by looking at the USDA zone info.


Planting Calendar for Pumpkins

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

You can not plant pumpkins until after the last frost when the weather gets warmer because they require warm weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant pumpkins
Possibly ok, but a risky time to plant pumpkins
Probably not a good time to plant pumpkins

The earliest that you can plant pumpkins in Willowbrook 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. If you wait any later than that and your pumpkins may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your pumpkins indoors.

Last Frost Date

The average date of last frost is April 15 in Willowbrook. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Willowbrook is just an average the actual date of last frost will vary from year to year. Half of the time in Willowbrook you get a frost after April 15 so always be ready to protect your pumpkins in the event of one of those late frosts.

USDA Zone Info for Willowbrook

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 Willowbrook

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