Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Mount Prospect you can estimate when to plant string beans by looking at the USDA zone info.

Planting Calendar for String beans

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

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

The earliest that you can plant string beans in Mount Prospect 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. Any later than that and your string beans may not have a chance to fully mature. Starting your string beans indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Mount Prospect the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Mount Prospect is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Mount Prospect you get surprised by a frost after April 15 so always be ready to protect your string beans if you have a surprise late frost.

USDA Zone Info for Mount Prospect

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 Mount Prospect

You may be interested in your other planting guides for Mount Prospect.