When can I plant Gladiolus 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.

By checking out the USDA zone info for Zone 12a you should be able to figure out when it's the best time to plant gladiolus.


Planting Calendar for Gladiolus

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

Gladiolus do ok in moderate cold which tells us that you can plant them slightly earlier than other frost tender plants.

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

The earliest that you can plant gladiolus 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 gladiolus and expect a good harvest is probably November. You probably don't want to wait any later than that or else your gladiolus may not have a chance to grow to maturity. If you are starting your gladiolus indoors then you might be able to get away with starting them a few 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.

Always keep in mind that USDA zone info for Zone 12a is an average and our actual date of last frost will vary from year to year. Since it never frosts in Zone 12a you do not have to be ready to protect your gladiolus 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.