When can I plant Centaurea in Zone 2a

The USDA Zone info is a great tool for gardeners to help us determine our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You can determine when it's the best time to plant centaurea in Zone 2a by reviewing the USDA zone info.


Planting Calendar for Centaurea

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

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

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

The earliest that you can plant centaurea 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 centaurea and expect a good harvest is probably August. Any later than that and your centaurea may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your centaurea indoors.

Last Frost Date

In Zone 2a the average date of last frost happens on May 15. In the coldest months of winter we can expect an average low temperature of -50°F.

Just be sure to remember that our actual date of last frost is just an average because it is based on the USDA zone info for Zone 2a and it is different every year. Half of the time in Zone 2a it frosts late in the year after May 15 so make sure that you are prepared to protect your centaurea in the event of 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.