The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of determining when to plant parsley is to refer to the USDA zone info for Sonoma.

Planting Calendar for Parsley

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

Parsley can survive in a little bit of cold which tells us that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant parsley in Sonoma is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant parsley and expect a good harvest is probably October. If you wait any later than that and your parsley may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your parsley indoors.

Last Frost Date

The average date of last frost is February 15 in Sonoma. In the coldest months of winter you can expect an average low temperature of 25°F.

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Sonoma and it changes from year to year. Since half of the time in Sonoma last frost occurs after February 15 be ready to cover your parsley if you have a surprise late frost.

USDA Zone Info for Sonoma

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 Sonoma

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