The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Elk Grove you should be able to determine when to plant tithonia.

Planting Calendar for Tithonia

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

Since tithonia do not do well in cold weather you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant tithonia in Elk Grove is March. However, you really should wait until April 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. Any later than that and your tithonia may not have a chance to grow to maturity. You can get started a little bit earlier by starting your tithonia indoors.

Last Frost Date

On average the last frost is on February 15 in Elk Grove. You should expect an average low temperature of 25°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Elk Grove is not always accurate and the actual date of last frost is different every year. Half of the time in Elk Grove you get surprised by a frost after February 15 so just be sure to be ready to cover your tithonia in the event of a late frost.

USDA Zone Info for Elk Grove

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Elk Grove

You may be interested in your other planting guides for Elk Grove.