The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of determining when it's the best time to plant chicory is to check out the USDA zone info for Oak Brook.

Planting Calendar for Chicory

Frost tolerance for chicory:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant chicory a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant chicory in Oak Brook is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant chicory and expect a good harvest is probably September. If you wait any later than that and your chicory may not have a chance to grow to maturity. You can get started a little bit earlier by starting your chicory indoors.

Last Frost Date

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

Since the USDA zone info for Oak Brook is not always accurate the actual date of last frost changes from year to year. Half of the time in Oak Brook you get a frost after April 15 so be sure to be ready to cover your chicory if you have a surprise late frost.

USDA Zone Info for Oak Brook

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 Oak Brook

You may be interested in your other planting guides for Oak Brook.