One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when to plant anchusa by using the USDA zone info for Red Wing.

Planting Calendar for Anchusa

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

Anchusa tend to make it in pretty solid cold which means that you can plant them quite a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant anchusa in Red Wing 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 anchusa and expect a good harvest is probably August. Any later than that and your anchusa may not have a chance to grow to maturity. You can get started a little bit earlier by starting your anchusa indoors.

Last Frost Date

The average date of last frost is May 15 in Red Wing. You should expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Red Wing is not always accurate the actual date of last frost will vary from year to year. Half of the time in Red Wing it frosts late in the year after May 15 so just be sure to be ready to cover your anchusa if you have one of those late frosts.

USDA Zone Info for Red Wing

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 Red Wing

You may be interested in your other planting guides for Red Wing.