When can I plant Coreopsis in Zone 2a

One of the first steps we take when we are making a decision about 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.

In Zone 2a you can figure out when to plant coreopsis by referring to the USDA zone info.


Planting Calendar for Coreopsis

Frost tolerance for coreopsis: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Coreopsis are moderately cold tolerant which tells us that you can plant them earlier than other frost tender plants.

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

The earliest that you can plant coreopsis in Zone 2a is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant coreopsis and expect a good harvest is probably August. If you wait any later than that and your coreopsis may not have a chance to really do well. Starting your coreopsis indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average all chance of frost has passed is on May 15 in Zone 2a. In the coldest months of winter we can expect an average low temperature of -50°F.

Since the USDA zone info for Zone 2a is an average our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 2a we get a frost after May 15 be ready to protect your coreopsis in the event of one of those late frosts.

USDA Zone Info for Zone 2a

Here is the info for USDA Zone 2a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)August 15
Lowest Expected Low-50°F
Highest Expected Low-45°F

This means that on a really cold year, the coldest it will get is -50°F. On most years you should be prepared to experience lows near -45°F.

Plants to Grow in Zone 2a

You may be interested in our other planting guides for Zone 2a.