One of the best tools that you have as gardeners to help us estimate 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.

The earliest that you can plant erysimum in Zone 12b should be estimated by referring to the USDA zone info.

Planting Calendar for Erysimum

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

Since erysimum do well in moderate cold you can plant them just a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant erysimum in Zone 12b 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 erysimum and expect a good harvest is probably November. Any later than that and your erysimum may not have a chance to grow to maturity. Starting your erysimum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Zone 12b it never frosts. You should expect an average low temperature of 55°F in the coldest months of winter.

Since the USDA zone info for Zone 12b may not be accurate from year to year the actual date of last frost will vary from year to year. Since it never frosts in Zone 12b you do not have to be ready to protect your erysimum if you have one of those late frosts.

USDA Zone Info for Zone 12b

Here is the info for USDA Zone 12b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	55°F
Highest Expected Low	60°F

This means that on a really cold year, the coldest it will get is 55°F. On most years you should be prepared to experience lows near 60°F.

Plants to Grow in Zone 12b

You may be interested in your other planting guides for Zone 12b.