When to Plant String beans in Wilmington, 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 best time to plant string beans in Wilmington can be determined by checking out the USDA zone info.

Create beautiful hand-made plants at forever-plants.com

Planting Calendar for String beans

Frost tolerance for string beans: Not tolerant of frost.
When to plant: After the last frost has passed.

Since string beans require warm weather it's important to wait until after the last frost before you can plant them.

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

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

Last Frost Date

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

Since the USDA zone info for Wilmington is an average the actual date of last frost will vary from year to year. Since half of the time in Wilmington you get surprised by a frost after April 15 be ready to cover your string beans if you have a late frost.

USDA Zone Info for Wilmington

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 Wilmington

You may be interested in your other planting guides for Wilmington.