When can I plant Columbine in Zone 3b

One of the best tools that we have as gardeners to help us figure out our gardening schedule is the 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.

The USDA zone info for Zone 3b can be reffered to in order to figure out when it's the best time to plant columbine.


Planting Calendar for Columbine

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

You can plant columbine a little earlier in the year because they do well in moderate cold.

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

The earliest that you can plant columbine in Zone 3b 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 columbine and expect a good harvest is probably August. Any later than that and your columbine may not have a chance to grow to maturity. If you are starting your columbine indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 3b. We can expect an average low temperature of -35°F in the coldest months of winter.

Since the USDA zone info for Zone 3b is an average our actual date of last frost will vary from year to year. Half of the time in Zone 3b we get a frost after May 15 so just be sure to be ready to cover your columbine if we have a surprise late frost.

USDA Zone Info for Zone 3b

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-35°F
Highest Expected Low-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Zone 3b

You may be interested in our other planting guides for Zone 3b.