When can I plant Twinspur in Zone 3a

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You can estimate when it's possible to plant twinspur in Zone 3a by checking out the USDA zone info.


Planting Calendar for Twinspur

Frost tolerance for twinspur: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Since twinspur do well in moderate cold you can plant them a bit earlier in the year than other plants that might not handle the cold.

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

The earliest that you can plant twinspur in Zone 3a is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant twinspur and expect a good harvest is probably August. Any later than that and your twinspur may not have a chance to fully mature. If you are starting your twinspur indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Zone 3a. In the coldest months of winter we can expect an average low temperature of -40°F.

Since the USDA zone info for Zone 3a may not be accurate from year to year our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 3a it frosts late in the year after May 15 be ready to cover your twinspur in the event of one of those late frosts.

USDA Zone Info for Zone 3a

Here is the info for USDA Zone 3a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-40°F
Highest Expected Low-35°F

This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.

Plants to Grow in Zone 3a

You may be interested in our other planting guides for Zone 3a.