When to Plant Trifolium in Downers Grove, IL

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

A way of figuring out when it's the best time to plant trifolium is to look at the USDA zone info for Downers Grove.


Planting Calendar for Trifolium

Frost tolerance for trifolium: Tolerant of a very small amount of frost.
When to plant: Up to 3 weeks before last frost.

Trifolium are barely cold tolerant which means that you can start planting them slightly earlier than more sensitive plants.

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

The earliest that you can plant trifolium in Downers Grove is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant trifolium and expect a good harvest is probably August. Any later than that and your trifolium may not have a chance to really do well. You can get started a couple of weeks earlier by starting your trifolium indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Downers Grove is an average and the actual date of last frost will vary from year to year. Since half of the time in Downers Grove you get surprised by a frost after April 15 be ready to cover your trifolium if you have a late frost.

USDA Zone Info for Downers Grove

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 Downers Grove

You may be interested in your other planting guides for Downers Grove.