When can I plant Sunflowers in Zone 13b

One of the best tools that we have as gardeners to help us figure out our 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 our area.

The first chance to plant sunflowers in Zone 13b can be estimated by referring to 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.

It's probably a bad idea to plant sunflowers until after the last frost because they require warm weather.

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 13b 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. You probably don't want to wait any later than that or else your sunflowers may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your sunflowers indoors.

Last Frost Date

In Zone 13b it never frosts. In the coldest months of winter we can expect an average low temperature of 65°F.

Since the USDA zone info for Zone 13b is not always accurate our actual date of last frost can change quite a bit from year to year. Since it never frosts in Zone 13b you do not have to be ready to cover your sunflowers in the event of a late frost.

USDA Zone Info for Zone 13b

Here is the info for USDA Zone 13b.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low65°F
Highest Expected Low70°F

This means that on a really cold year, the coldest it will get is 65°F. On most years you should be prepared to experience lows near 70°F.

Plants to Grow in Zone 13b

You may be interested in our other planting guides for Zone 13b.