One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's possible to plant lunaria by checking out the USDA zone info for River Forest.

Planting Calendar for Lunaria

Frost tolerance for lunaria:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant lunaria a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant lunaria in River Forest is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant lunaria and expect a good harvest is probably September. Any later than that and your lunaria may not have a chance to fully mature. If you are starting your lunaria indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In River Forest the average date of last frost happens on April 15. It might get as low as -10°F during 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 last frost occurs after April 15 so always be ready to protect your lunaria if you have a 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.