The USDA Zone info is a great tool for gardeners to help us estimate 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.

The USDA zone info for Red Wing can be reffered to in order to estimate when it's a good idea to plant salvia.

Planting Calendar for Salvia

Frost tolerance for salvia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since salvia are barely cold tolerant you can plant them slightly earlier in the year than other plants that might not handle the cold.

The earliest that you can plant salvia in Red Wing is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant salvia and expect a good harvest is probably August. If you wait any later than that and your salvia may not have a chance to fully mature. You can get started a few weeks earlier by starting your salvia indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Red Wing. In the coldest months of winter you can expect an average low temperature of -25°F.

Remember that USDA zone info for Red Wing may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Red Wing you get surprised by a frost after May 15 so just be sure to be ready to protect your salvia if you have 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.