One of the first steps you take when you are getting a good idea your gardening schedule is find your 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 figure out when it's a good idea to plant chervil by using the USDA zone info for Des Plaines.

Planting Calendar for Chervil

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

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

The earliest that you can plant chervil in Des Plaines 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 chervil and expect a good harvest is probably August. You probably don't want to wait any later than that or else your chervil may not have a chance to really do well. You can get started a little bit earlier by starting your chervil indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Des Plaines. In the coldest months of winter you can expect an average low temperature of -15°F.

Since the USDA zone info for Des Plaines is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Des Plaines last frost occurs after April 15 so always be ready to protect your chervil if you have a late frost.

USDA Zone Info for Des Plaines

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 Des Plaines

You may be interested in your other planting guides for Des Plaines.