The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By checking out the USDA zone info for Valley City you should be able to estimate when you can plant liatris.

Planting Calendar for Liatris

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

Since liatris are one of those plants that can tolerate quite a bit of cold weather you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant liatris 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 liatris and expect a good harvest is probably August. You probably don't want to wait any later than that or else your liatris may not have a chance to grow to maturity. Starting your liatris indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Valley City is an average the actual date of last frost will vary from year to year. Half of the time in Valley City last frost occurs after May 15 so make sure that you are prepared to protect your liatris if you have 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.