One of the first steps you take when you are figuring out 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.

The first opportunity to plant petunias in Zone 12b should be figured out by referring to the USDA zone info.

Planting Calendar for Petunias

Frost tolerance for petunias:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since petunias do ok in moderate cold you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant petunias 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 petunias and expect a good harvest is probably November. You probably don't want to wait any later than that or else your petunias may not have a chance to fully mature. Starting your petunias indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Zone 12b it never frosts. It might get as low as 55°F during the coldest months of winter.

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Zone 12b and it can change quite a bit from year to year. Since it never frosts in Zone 12b you do not have to be ready to cover your petunias if you have a late frost.

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.