When can I plant Liatris in Zone 1a

One of the first steps we take when we are determining our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

By looking at the USDA zone info for Zone 1a it's a good idea to figure out when it's a good idea to plant liatris.


Planting Calendar for Liatris

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

Liatris are one of those plants that can tolerate quite a bit of cold weather which tells us that you can start planting them much earlier than other frost tender plants.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant liatris
Possibly ok, but a risky time to plant liatris
Probably not a good time to plant liatris

The earliest that you can plant liatris in Zone 1a is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant liatris and expect a good harvest is probably July. You probably don't want to wait any later than that or else your liatris may not have a chance to really do well. You can get started a couple of weeks earlier by starting your liatris indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on June 15 in Zone 1a. In the coldest months of winter we should expect an average low temperature of -60°F.

Remember that USDA zone info for Zone 1a may not be accurate from year to year and our actual date of last frost will vary from year to year. Since half of the time in Zone 1a it frosts late in the year after June 15 be ready to cover your liatris if we have a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.