One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant cabbage in Sonoma can be estimated by referring to the USDA zone info.

Planting Calendar for Cabbage

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

You can plant cabbage a bit earlier in the year because they are moderately cold tolerant.

The earliest that you can plant cabbage 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 cabbage and expect a good harvest is probably October. Any later than that and your cabbage may not have a chance to grow to maturity. If you are starting your cabbage indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Sonoma is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Sonoma there is a last frost after February 15 so always be ready to cover your cabbage if you have one of those late frosts.

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.