When can I plant Periwinkles in Braidwood, IL

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

By referring to the USDA zone info for Braidwood it's possible to estimate when it's possible to plant periwinkles.

Planting Calendar for Periwinkles

Frost tolerance for periwinkles: Not tolerant of frost.
When you should plant them: After the last frost.

Since periwinkles are not cold tolerant you really should wait until after the last frost when the weather gets warmer before you can plant them.

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

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

Last Frost Date

The average date of last frost is April 15 in Braidwood. In the coldest months of winter we should expect an average low temperature of -15°F.

Since the USDA zone info for Braidwood is an average our actual date of last frost will vary from year to year. Since half of the time in Braidwood we get surprised by a frost after April 15 be ready to protect your periwinkles in the event of one of those late frosts.

USDA Zone Info for Braidwood

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 Braidwood

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