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 first chance to plant rock cress in Mitchell should be determined by reviewing the USDA zone info.

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 earlier in the year than other plants that might not handle the cold.

The earliest that you can plant rock cress in Mitchell 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. You probably don't want to wait any later than that or else your rock cress may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your rock cress indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Mitchell. You can expect an average low temperature of -25°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Mitchell and it is different every year. Since half of the time in Mitchell there is a last frost after May 15 be ready to protect your rock cress in the event of a late frost.

USDA Zone Info for Mitchell

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 Mitchell

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