One of the first steps you take when you are figuring out 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.

The USDA zone info for Williams should be read to estimate when to plant chervil.

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 start planting them slightly earlier than other frost tender plants.

The earliest that you can plant chervil in Williams 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 chervil and expect a good harvest is probably September. Any later than that and your chervil may not have a chance to really do well. You can get started a couple of weeks earlier by starting your chervil indoors.

Last Frost Date

The average date of last frost is February 15 in Williams. It might get as low as 25°F during the coldest months of winter.

Keep in mind that USDA zone info for Williams is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Williams you get surprised by a frost after February 15 so make sure that you are ready to cover your chervil in the event of a surprise late frost.

USDA Zone Info for Williams

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Williams

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