When to Plant Tithonia in Zone 2a

One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when it's a good idea to plant tithonia in Zone 2a by looking at the USDA zone info.


Planting Calendar for Tithonia

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

Tithonia are not cold tolerant which tells us that you need to wait until it warms up after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant tithonia
Possibly ok, but a risky time to plant tithonia
Probably not a good time to plant tithonia

The earliest that you can plant tithonia in Zone 2a is May. However, you really should wait until June 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 really do well. You can get started a couple of weeks earlier by starting your tithonia indoors.

Last Frost Date

In Zone 2a the average date of last frost happens on May 15. It might get as low as -50°F during the coldest months of winter.

It's important to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 2a and it is different every year. Half of the time in Zone 2a it frosts late in the year after May 15 so make sure that you are prepared to cover your tithonia if you have a late frost.

USDA Zone Info for Zone 2a

Here is the info for USDA Zone 2a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)August 15
Lowest Expected Low-50°F
Highest Expected Low-45°F

This means that on a really cold year, the coldest it will get is -50°F. On most years you should be prepared to experience lows near -45°F.

Plants to Grow in Zone 2a

You may be interested in your other planting guides for Zone 2a.