The USDA Zone info is a great tool for gardeners to help us figure out your gardening 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 Oak Brook should be reviewed to figure out when you can plant festuca.

Planting Calendar for Festuca

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

Since festuca do well in moderate cold you can plant them a little bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant festuca 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 festuca and expect a good harvest is probably September. If you wait any later than that and your festuca may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your festuca indoors.

Last Frost Date

On average the last frost is on April 15 in Oak Brook. It might get as low as -15°F during the coldest months of winter.

It's important to remember that USDA zone info for Oak Brook is not always accurate and 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 just be sure to be ready to cover your festuca in the event of 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.