When to Plant Coral Bells in Willowbrook, IL

Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Willowbrook should be reviewed to figure out when it's the best time to plant coral bells.


Planting Calendar for Coral Bells

Frost tolerance for coral bells: Tolerant of some frost.
When to plant: Up to 5 weeks before last frost.

Coral Bells do well in moderate cold which tells us that you can get them planted earlier than other frost tender plants.

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

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

Last Frost Date

On average all chance of frost has passed is on April 15 in Willowbrook. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Willowbrook may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Willowbrook you get surprised by a frost after April 15 so always be ready to cover your coral bells if you have a surprise late frost.

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 your other planting guides for Willowbrook.