The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By using the USDA zone info for Red Wing you will be able to determine when it's possible to plant sorrel.

Planting Calendar for Sorrel

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

Sorrel tend to make it in mild cold which tells us that you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant sorrel 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 sorrel and expect a good harvest is probably August. If you wait any later than that and your sorrel may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your sorrel indoors.

Last Frost Date

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

Just be sure to remember that USDA zone info for Red Wing is an average and the actual date of last frost is different every year. Half of the time in Red Wing last frost occurs after May 15 so make sure that you are ready to cover your sorrel in the event of a surprise late frost.

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.