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.

The USDA zone info for Valley City can be reffered to in order to determine when you can plant rock cress.

Planting Calendar for Rock Cress

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

Rock Cress can survive in a bit of cold which means that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant rock cress in Valley City 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. If you wait 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

The average date of last frost is May 15 in Valley City. You should expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Valley City is just an average the actual date of last frost is different every year. Since half of the time in Valley City you get a frost after May 15 be ready to cover your rock cress in the event of one of those late frosts.

USDA Zone Info for Valley City

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Valley City

You may be interested in your other planting guides for Valley City.