One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can determine when it's a good idea to plant ajuga in Holmen by using the USDA zone info.

Planting Calendar for Ajuga

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

Ajuga do ok in cold weather which tells us that you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant ajuga in Holmen 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 ajuga and expect a good harvest is probably August. Any later than that and your ajuga may not have a chance to really do well. You can get started a couple of weeks earlier by starting your ajuga indoors.

Last Frost Date

In Holmen the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -25°F.

Since the USDA zone info for Holmen is just an average the actual date of last frost changes from year to year. Half of the time in Holmen you get surprised by a frost after May 15 so just be sure to be ready to cover your ajuga in the event of a late frost.

USDA Zone Info for Holmen

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 Holmen

You may be interested in your other planting guides for Holmen.