When can I plant Four O' Clock in Zone 11a

Before planting it is a good idea to find our USDA Zone info to estimate our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The first chance to plant four o' clock in Zone 11a can be figured out by looking at the USDA zone info.


Planting Calendar for Four O' Clock

Frost tolerance for four o' clock: Not tolerant of frost.
When you should plant them: After the last frost.

You can not plant four o' clock until after all chance of frost has passed because they require warm weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant four o' clock
Possibly ok, but a risky time to plant four o' clock
Probably not a good time to plant four o' clock

The earliest that you can plant four o' clock in Zone 11a 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 four o' clock and expect a good harvest is probably November. If you wait any later than that and your four o' clock may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your four o' clock indoors.

Last Frost Date

In Zone 11a it never frosts. In the coldest months of winter we should expect an average low temperature of 40°F.

Since the USDA zone info for Zone 11a is not always accurate our actual date of last frost is different every year. Since it never frosts in Zone 11a you do not have to be ready to cover your four o' clock if we have a late frost.

USDA Zone Info for Zone 11a

Here is the info for USDA Zone 11a.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low40°F
Highest Expected Low45°F

This means that on a really cold year, the coldest it will get is 40°F. On most years you should be prepared to experience lows near 45°F.

Plants to Grow in Zone 11a

You may be interested in our other planting guides for Zone 11a.