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.

In River Forest you can determine when it's the best time to plant ornamental grasses by reviewing the USDA zone info.

Planting Calendar for Ornamental Grasses

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

You can plant ornamental grasses a bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant ornamental grasses in River Forest 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 ornamental grasses and expect a good harvest is probably August. If you wait any later than that and your ornamental grasses may not have a chance to fully mature. Starting your ornamental grasses indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In River Forest the average date of last frost happens on April 15. You can expect an average low temperature of -10°F in the coldest months of winter.

Just be sure to remember that USDA zone info for River Forest 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 River Forest you get a frost after April 15 so be sure to be ready to cover your ornamental grasses if you have a surprise late frost.

USDA Zone Info for River Forest

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in River Forest

You may be interested in your other planting guides for River Forest.