Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when it's the best time to plant iberis is to refer to the USDA zone info for Clarendon Hills.

Planting Calendar for Iberis

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

Iberis can survive in mild cold which means that you can plant them a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant iberis in Clarendon Hills 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 iberis and expect a good harvest is probably September. You probably don't want to wait any later than that or else your iberis may not have a chance to really do well. Starting your iberis indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on April 15 in Clarendon Hills. In the coldest months of winter you can expect an average low temperature of -15°F.

Just be sure to remember that USDA zone info for Clarendon Hills may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Clarendon Hills it frosts late in the year after April 15 be ready to protect your iberis in the event of a surprise late frost.

USDA Zone Info for Clarendon Hills

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 Clarendon Hills

You may be interested in your other planting guides for Clarendon Hills.