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 earliest that you can plant tithonia in Clear Lake can be figured out by using the USDA zone info.

Planting Calendar for Tithonia

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

You really shouldn't plant tithonia until after all chance of frost has passed because they require warm weather.

The earliest that you can plant tithonia in Clear Lake 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. 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

The average date of last frost is April 15 in Clear Lake. It might get as low as -20°F during the coldest months of winter.

Since the USDA zone info for Clear Lake may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Clear Lake you get surprised by a frost after April 15 be ready to cover your tithonia if you have one of those late frosts.

USDA Zone Info for Clear Lake

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Clear Lake

You may be interested in your other planting guides for Clear Lake.