One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Wisconsin Rapids you can determine when to plant yarrow by using the USDA zone info.

Planting Calendar for Yarrow

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

Yarrow can survive in pretty solid cold which tells us that you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant yarrow in Wisconsin Rapids 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 yarrow and expect a good harvest is probably August. Any later than that and your yarrow may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your yarrow indoors.

Last Frost Date

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

Since the USDA zone info for Wisconsin Rapids is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Wisconsin Rapids it frosts late in the year after May 15 so always be ready to cover your yarrow in the event of one of those late frosts.

USDA Zone Info for Wisconsin Rapids

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 Wisconsin Rapids

You may be interested in your other planting guides for Wisconsin Rapids.