One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In San Bernardino you can estimate when it's the best time to plant red cabbage by reviewing the USDA zone info.

Planting Calendar for Red cabbage

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

Since red cabbage do well in cold you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant red cabbage in San Bernardino 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 red cabbage and expect a good harvest is probably October. If you wait any later than that and your red cabbage may not have a chance to fully mature. If you are starting your red cabbage indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In San Bernardino the average date of last frost happens on February 15. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for San Bernardino may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in San Bernardino you get a frost after February 15 so always be ready to protect your red cabbage in the event of a late frost.

USDA Zone Info for San Bernardino

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 San Bernardino

You may be interested in your other planting guides for San Bernardino.