When to Plant Nierembergia in Stone Park, IL

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

The USDA zone info for Stone Park can be used to figure out when it's the best time to plant nierembergia.


Planting Calendar for Nierembergia

Frost tolerance for nierembergia: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Nierembergia are not cold tolerant which tells us that it is necessary to wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant nierembergia in Stone Park 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 nierembergia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your nierembergia may not have a chance to fully mature. If you are starting your nierembergia 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 April 15 in Stone Park. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Stone Park and it changes from year to year. Half of the time in Stone Park it frosts late in the year after April 15 so always be ready to cover your nierembergia in the event of a surprise late frost.

USDA Zone Info for Stone Park

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 Stone Park

You may be interested in your other planting guides for Stone Park.