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

You can estimate when you can plant four-o-clock flower in Key West by looking at the USDA zone info.

Planting Calendar for Four-o-clock flower

Frost tolerance for four-o-clock flower:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant four-o-clock flower until after the last frost because they are not cold tolerant.

The earliest that you can plant four-o-clock flower in Key West 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 fully mature. You can get started a little bit earlier by starting your four-o-clock flower indoors.

Last Frost Date

In Key West it never frosts. It might get as low as 45°F during the coldest months of winter.

Keep in mind that USDA zone info for Key West may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since it never frosts in Key West you do not have to be ready to protect your four-o-clock flower if you have a late frost.

USDA Zone Info for Key West

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	45°F
Highest Expected Low	50°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 Key West

You may be interested in your other planting guides for Key West.