When can I plant Hardy Asters in Zone 12a

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

You can determine when it's possible to plant hardy asters in Zone 12a by using the USDA zone info.


Planting Calendar for Hardy Asters

Frost tolerance for hardy asters: Tolerant of a very small amount of frost.
When you should plant them: Up to 3 weeks before last frost.

Since hardy asters are one of those plants that can tolerate a tiny bit of cold weather you can plant them just a tiny bit earlier in the year than other frost tender plants.

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

The earliest that you can plant hardy asters in Zone 12a 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 hardy asters and expect a good harvest is probably November. If you wait any later than that and your hardy asters may not have a chance to grow to maturity. Starting your hardy asters indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Zone 12a it never frosts. In the coldest months of winter we can expect an average low temperature of 50°F.

Remember that USDA zone info for Zone 12a may not be accurate from year to year and our actual date of last frost can change quite a bit from year to year. Since it never frosts in Zone 12a you do not have to be ready to protect your hardy asters in the event of a late frost.

USDA Zone Info for Zone 12a

Here is the info for USDA Zone 12a.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low50°F
Highest Expected Low55°F

This means that on a really cold year, the coldest it will get is 50°F. On most years you should be prepared to experience lows near 55°F.

Plants to Grow in Zone 12a

You may be interested in our other planting guides for Zone 12a.