The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Azusa you can determine when it's the best time 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 all chance of frost has passed.

It's probably not a good idea to plant tithonia until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant tithonia in Azusa 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. You probably don't want to wait any later than that or else your tithonia may not have a chance to really do well. You can get started a couple of weeks earlier by starting your tithonia indoors.

Last Frost Date

On average the last frost is on January 31 in Azusa. It might get as low as 30°F during the coldest months of winter.

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Azusa and it is different every year. Half of the time in Azusa you get surprised by a frost after January 31 so just be sure to be ready to cover your tithonia in the event of one of those late frosts.

USDA Zone Info for Azusa

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 Azusa

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