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.

A common way of estimating when it's possible to plant iberis is to examine the USDA zone info for Western Springs.

Planting Calendar for Iberis

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

You can plant iberis a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant iberis in Western Springs 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. If you wait any later than that and your iberis may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your iberis indoors.

Last Frost Date

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

Since the USDA zone info for Western Springs is not always accurate the actual date of last frost will vary from year to year. Half of the time in Western Springs there is a last frost after April 15 so make sure that you are prepared to cover your iberis if you have a late frost.

USDA Zone Info for Western Springs

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 Western Springs

You may be interested in your other planting guides for Western Springs.