Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By checking out the USDA zone info for Hillsdale you will be able to figure out when you can plant ajuga.

Planting Calendar for Ajuga

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

Since ajuga are very cold tolerant you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant ajuga in Hillsdale is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant ajuga and expect a good harvest is probably September. You probably don't want to wait any later than that or else your ajuga may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your ajuga indoors.

Last Frost Date

The average date of last frost is April 15 in Hillsdale. You can expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Hillsdale is just an average and the actual date of last frost will vary from year to year. Half of the time in Hillsdale last frost occurs after April 15 so always be ready to protect your ajuga if you have one of those late frosts.

USDA Zone Info for Hillsdale

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Hillsdale

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