When to Plant Chervil in Alton, IL

The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant chervil in Alton can be figured out by checking out the USDA zone info.


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.

Chervil are barely cold tolerant which means that you can plant them slightly earlier than other plants that might not handle the cold.

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

The earliest that you can plant chervil in Alton 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. Starting your chervil indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Alton. It might get as low as -10°F during the coldest months of winter.

It's important to remember that USDA zone info for Alton is an average and the actual date of last frost changes from year to year. Since half of the time in Alton you get surprised by a frost after April 15 be ready to cover your chervil in the event of one of those late frosts.

USDA Zone Info for Alton

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 Alton

You may be interested in your other planting guides for Alton.