Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when to plant twinspur by using the USDA zone info for Eau Claire.

Planting Calendar for Twinspur

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

Twinspur are moderately cold tolerant which means that you can start planting them earlier than more sensitive plants.

The earliest that you can plant twinspur in Eau Claire 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. If you wait any later than that and your twinspur may not have a chance to really do well. If you are starting your twinspur indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on May 15 in Eau Claire. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Eau Claire is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Eau Claire last frost occurs after May 15 be ready to protect your twinspur in the event of a late frost.

USDA Zone Info for Eau Claire

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Eau Claire

You may be interested in your other planting guides for Eau Claire.