Planting Guides for Monticello

According to the USDA Monticello is in USDA Zone 5b. Here is some general info for USDA Zone 5b to help you get started.

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.

You can view the USDA Zone map for Illinois here:

Below is a list of planting guides for Monticello, IL. These guides are based on data from Zone 5b.