When can I plant Catharanthus in Zone 11b

One of the first steps we take when we are making a decision about our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The first opportunity to plant catharanthus in Zone 11b should be estimated by checking out the USDA zone info.


Planting Calendar for Catharanthus

Frost tolerance for catharanthus: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

You really shouldn't plant catharanthus until after the last frost because they do not do well in cold weather.

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

The earliest that you can plant catharanthus 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 catharanthus and expect a good harvest is probably November. If you wait any later than that and your catharanthus may not have a chance to grow to maturity. If you are starting your catharanthus indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Zone 11b it never frosts. In the coldest months of winter we should expect an average low temperature of 45°F.

Since the USDA zone info for Zone 11b is not always accurate our actual date of last frost can change quite a bit from year to year. Since it never frosts in Zone 11b you do not have to be ready to cover your catharanthus in the event of 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.