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.

You can estimate when it's possible to plant tritoma in Columbus by using the USDA zone info.

Planting Calendar for Tritoma

Frost tolerance for tritoma:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Tritoma do well in a bit of cold which tells us that you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant tritoma in Columbus 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 tritoma and expect a good harvest is probably September. If you wait any later than that and your tritoma may not have a chance to really do well. You can get started a couple of weeks earlier by starting your tritoma indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Columbus. It might get as low as -20°F during the coldest months of winter.

Since the USDA zone info for Columbus may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Columbus it frosts late in the year after April 15 so make sure that you are ready to cover your tritoma in the event of a late frost.

USDA Zone Info for Columbus

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 Columbus

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