One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of getting a good idea when to plant tritoma is to check out the USDA zone info for Zone 2b.

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 cold which means that you can start planting them much earlier than other frost tender plants.

The earliest that you can plant tritoma in Zone 2b 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 tritoma and expect a good harvest is probably August. If you wait any later than that and your tritoma may not have a chance to grow to maturity. If you are starting your tritoma indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Zone 2b the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -45°F.

Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Zone 2b and it can change quite a bit from year to year. Half of the time in Zone 2b there is a last frost after May 15 so always be ready to protect your tritoma if you have a surprise late frost.

USDA Zone Info for Zone 2b

Here is the info for USDA Zone 2b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	August 15
Lowest Expected Low	-45°F
Highest Expected Low	-40°F

This means that on a really cold year, the coldest it will get is -45°F. On most years you should be prepared to experience lows near -40°F.

Plants to Grow in Zone 2b

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