Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Cleveland can be reviewed to figure out when you can plant tithonia.

Planting Calendar for Tithonia

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

Tithonia require warm weather which means that you really should wait until it warms up after the last frost before you can plant them.

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

The last month that you can plant tithonia and expect a good harvest is probably August. If you wait any later than that and your tithonia may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your tithonia indoors.

Last Frost Date

On average the last frost is on March 15 in Cleveland. It might get as low as 10°F during the coldest months of winter.

Always keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Cleveland and it is different every year. Since half of the time in Cleveland there is a last frost after March 15 be ready to protect your tithonia in the event of a late frost.

USDA Zone Info for Cleveland

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Cleveland

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