When can I plant Four-o-clock flower in Zone 11a

One of the best tools that we have as gardeners to help us estimate 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 USDA zone info for Zone 11a should be reffered to in order to figure out when to plant four-o-clock flower.


Planting Calendar for Four-o-clock flower

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

You really shouldn't plant four-o-clock flower until after the last frost when the weather gets warmer because they are not cold tolerant.

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

The earliest that you can plant four-o-clock flower 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 flower and expect a good harvest is probably November. You probably don't want to wait any later than that or else your four-o-clock flower may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your four-o-clock flower indoors.

Last Frost Date

In Zone 11a it never frosts. In the coldest months of winter we can 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 will vary from year to year. Since it never frosts in Zone 11a you do not have to be ready to protect your four-o-clock flower 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.