When can I plant Sunflowers in Zone 12b

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The earliest that you can plant sunflowers in Zone 12b can be figured out by checking out the USDA zone info.


Planting Calendar for Sunflowers

Frost tolerance for sunflowers: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Sunflowers are not cold tolerant which tells us that you need to wait until it warms up after the last frost before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant sunflowers
Possibly ok, but a risky time to plant sunflowers
Probably not a good time to plant sunflowers

The earliest that you can plant sunflowers 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 sunflowers and expect a good harvest is probably November. Any later than that and your sunflowers may not have a chance to grow to maturity. You can get started a little bit earlier by starting your sunflowers indoors.

Last Frost Date

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

It's important to remember that our actual date of last frost is an average because it is based on the USDA zone info for Zone 12b and it changes from year to year. Since it never frosts in Zone 12b you do not have to be ready to protect your sunflowers if we have a surprise 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 Low55°F
Highest Expected Low60°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 our other planting guides for Zone 12b.