When can I plant Columbine in Lisle, IL

Before planting it is a good idea to find our USDA Zone info to estimate our garden schedule. 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 Lisle you will be able to estimate when you can 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 just a bit 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 Lisle is February. However, you really should wait until March if you don't want to take any chances.

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

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Lisle. It might get as low as -15°F during the coldest months of winter.

Keep in mind that our actual date of last frost is just an average because it is based on the USDA zone info for Lisle and it changes from year to year. Half of the time in Lisle last frost occurs after April 15 so always be ready to cover your columbine if we have a surprise late frost.

USDA Zone Info for Lisle

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-15°F
Highest Expected Low-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Lisle

You may be interested in our other planting guides for Lisle.