When can I plant Tritoma in Zone 5a

Before planting it is a good idea to find our USDA Zone info to determine our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

One way of getting a good idea when it's a good idea to plant tritoma is to consult the USDA zone info for Zone 5a.


Planting Calendar for Tritoma

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

Since tritoma are very cold tolerant you can plant them much earlier in the year than other plants that might not handle the cold.

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

The earliest that you can plant tritoma in Zone 5a 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. You probably don't want to wait any later than that or else 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 few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Zone 5a. We should expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Zone 5a is just an average our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 5a we get surprised by a frost after April 15 be ready to cover your tritoma if we have one of those late frosts.

USDA Zone Info for Zone 5a

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 Zone 5a

You may be interested in our other planting guides for Zone 5a.