One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. 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 estimating when it's a good idea to plant rock cress is to refer to the USDA zone info for Chanhassen.

Planting Calendar for Rock Cress

Frost tolerance for rock cress:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since rock cress do well in cold you can plant them a lot earlier in the year than other plants that might not handle the cold.

The earliest that you can plant rock cress in Chanhassen 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 rock cress and expect a good harvest is probably August. Any later than that and your rock cress may not have a chance to really do well. You can get started a couple of weeks earlier by starting your rock cress indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Chanhassen. In the coldest months of winter you should expect an average low temperature of -25°F.

Always keep in mind that USDA zone info for Chanhassen is just an average and the actual date of last frost is different every year. Since half of the time in Chanhassen it frosts late in the year after May 15 be ready to protect your rock cress if you have one of those late frosts.

USDA Zone Info for Chanhassen

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Chanhassen

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