Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of estimating when it's possible to plant iberis is to look at the USDA zone info for Chisholm.

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 Chisholm is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant iberis and expect a good harvest is probably August. If you wait any later than that and your iberis may not have a chance to really do well. You can get started a few weeks earlier by starting your iberis indoors.

Last Frost Date

On average the last frost has passed is on May 15 in Chisholm. In the coldest months of winter you should expect an average low temperature of -35°F.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Chisholm and it can change quite a bit from year to year. Since half of the time in Chisholm you get a frost after May 15 be ready to protect your iberis if you have a surprise late frost.

USDA Zone Info for Chisholm

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-35°F
Highest Expected Low	-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Chisholm

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