When can I plant Calliopsis in Zone 2a

Before planting it is a good idea to find our USDA Zone info to estimate our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The USDA zone info for Zone 2a can be looked at to estimate when it's the best time to plant calliopsis.


Planting Calendar for Calliopsis

Frost tolerance for calliopsis: Not tolerant of frost.
When you should plant them: After all chance of frost has passed.

Calliopsis require warm weather which means that you must wait until it warms up after all chance of frost has passed before you can plant them.

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

The earliest that you can plant calliopsis in Zone 2a 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 calliopsis and expect a good harvest is probably August. Any later than that and your calliopsis may not have a chance to really do well. You can get started a couple of weeks earlier by starting your calliopsis indoors.

Last Frost Date

In Zone 2a the average date of last frost happens on May 15. It might get as low as -50°F during the coldest months of winter.

Keep in mind that USDA zone info for Zone 2a is just an average and our actual date of last frost will vary from year to year. Since half of the time in Zone 2a we get a frost after May 15 be ready to cover your calliopsis if we have a late frost.

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.