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

Before planting it is a good idea to find our USDA Zone info to determine 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.

One way of figuring out when you can plant four o' clock is to examine the USDA zone info for Zone 11b.


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 has passed.

Four O' Clock are not cold tolerant which tells us that it is necessary to wait until it warms up after all chance of frost has passed before you can plant them.

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 11b 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 fully mature. You can get started a couple of weeks earlier by starting your four o' clock indoors.

Last Frost Date

In Zone 11b it never frosts. It might get as low as 45°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Zone 11b is just an average and our actual date of last frost is different every year. Since it never frosts in Zone 11b you do not have to be ready to protect your four o' clock if we have a late frost.

USDA Zone Info for Zone 11b

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low45°F
Highest Expected Low50°F

This means that on a really cold year, the coldest it will get is 45°F. On most years you should be prepared to experience lows near 50°F.

Plants to Grow in Zone 11b

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