One of the best tools that you have as gardeners to help us estimate your 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 your area.

You should be able to estimate when it's possible to plant tithonia by using the USDA zone info for Zone 13b.

Planting Calendar for Tithonia

Frost tolerance for tithonia:	Not tolerant of frost.
When to plant:	After the last frost.

Tithonia do not do well in cold weather 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.

The earliest that you can plant tithonia in Zone 13b 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 tithonia and expect a good harvest is probably November. If you wait any later than that and your tithonia may not have a chance to fully mature. If you are starting your tithonia indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Zone 13b it never frosts. It might get as low as 65°F during the coldest months of winter.

Remember that USDA zone info for Zone 13b is just an average and the actual date of last frost is different every year. Since it never frosts in Zone 13b you do not have to be ready to protect your tithonia if you have a surprise late frost.

USDA Zone Info for Zone 13b

Here is the info for USDA Zone 13b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	65°F
Highest Expected Low	70°F

This means that on a really cold year, the coldest it will get is 65°F. On most years you should be prepared to experience lows near 70°F.

Plants to Grow in Zone 13b

You may be interested in your other planting guides for Zone 13b.