When can I plant Doronicum in Willowbrook, IL

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

A common way of determining when it's the best time to plant doronicum is to examine the USDA zone info for Willowbrook.

Planting Calendar for Doronicum

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

Doronicum do well in a little bit of cold which means that you can plant them a little earlier in the year than more sensitive plants.

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

The earliest that you can plant doronicum in Willowbrook 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 doronicum and expect a good harvest is probably September. You probably don't want to wait any later than that or else your doronicum may not have a chance to really do well. You can get started a few weeks earlier by starting your doronicum indoors.

Last Frost Date

In Willowbrook the average date of last frost happens on April 15. In the coldest months of winter we should expect an average low temperature of -15°F.

Since the USDA zone info for Willowbrook is not always accurate our actual date of last frost changes from year to year. Half of the time in Willowbrook we get a frost after April 15 so make sure that you are prepared to cover your doronicum if we have one of those late frosts.

USDA Zone Info for Willowbrook

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 Willowbrook

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