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.

By looking at the USDA zone info for Napa it's a good idea to estimate when it's possible to plant savoy cabbage.

Planting Calendar for Savoy cabbage

Frost tolerance for savoy cabbage:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Savoy cabbage tend to make it in a bit of cold which means that you can plant them much earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant savoy cabbage in Napa 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 savoy cabbage and expect a good harvest is probably October. If you wait any later than that and your savoy cabbage may not have a chance to fully mature. You can get started a little bit earlier by starting your savoy cabbage indoors.

Last Frost Date

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

Since the USDA zone info for Napa is not always accurate the actual date of last frost is different every year. Since half of the time in Napa you get surprised by a frost after February 15 be ready to protect your savoy cabbage in the event of a late frost.

USDA Zone Info for Napa

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 Napa

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