The USDA Zone info is a great tool for gardeners to help us determine 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.

In Manteca you can determine when you can plant napa cabbage by looking at 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 do ok in pretty solid cold which means that you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant napa cabbage in Manteca 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. Any later than that and your napa cabbage may not have a chance to really do well. You can get started a little bit earlier by starting your napa cabbage indoors.

Last Frost Date

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

Since the USDA zone info for Manteca is an average the actual date of last frost will vary from year to year. Half of the time in Manteca it frosts late in the year after February 15 so make sure that you are ready to protect your napa cabbage if you have one of those late frosts.

USDA Zone Info for Manteca

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 Manteca

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