Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Whittier you can determine when it's a good idea to plant tithonia by referring to the USDA zone info.

Planting Calendar for Tithonia

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

Since tithonia require warm weather you have to wait until after the last frost has passed before you can plant them.

The earliest that you can plant tithonia in Whittier is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant tithonia and expect a good harvest is probably September. If you wait any later than that and your tithonia may not have a chance to fully mature. You can get started a few weeks earlier by starting your tithonia indoors.

Last Frost Date

In Whittier the average date of last frost happens on January 31. In the coldest months of winter you can expect an average low temperature of 30°F.

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Whittier and it is different every year. Since half of the time in Whittier last frost occurs after January 31 be ready to cover your tithonia in the event of a late frost.

USDA Zone Info for Whittier

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Whittier

You may be interested in your other planting guides for Whittier.