Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant napa cabbage in National City can be estimated by referring to the USDA zone info.

Planting Calendar for Napa cabbage

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

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

The earliest that you can plant napa cabbage in National City 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 napa cabbage and expect a good harvest is probably October. You probably don't want to wait any later than that or else your napa cabbage may not have a chance to grow to maturity. You can get started a little bit earlier by starting your napa cabbage indoors.

Last Frost Date

In National City the average date of last frost happens on January 31. You should expect an average low temperature of 35°F in the coldest months of winter.

Since the USDA zone info for National City is an average the actual date of last frost will vary from year to year. Half of the time in National City last frost occurs after January 31 so just be sure to be ready to protect your napa cabbage if you have a surprise late frost.

USDA Zone Info for National City

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in National City

You may be interested in your other planting guides for National City.