One of the best tools that you have as gardeners to help us determine 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 will be able to estimate when it's possible to plant ajuga by using the USDA zone info for Royal Oak.

Planting Calendar for Ajuga

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

Ajuga can survive in a bit of cold which means that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant ajuga in Royal Oak 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. Any later than that and your ajuga may not have a chance to fully mature. You can get started a few weeks earlier by starting your ajuga indoors.

Last Frost Date

The average date of last frost is April 15 in Royal Oak. It might get as low as -10°F during the coldest months of winter.

It's important to remember that USDA zone info for Royal Oak is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Royal Oak there is a last frost after April 15 be ready to protect your ajuga in the event of a late frost.

USDA Zone Info for Royal Oak

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Royal Oak

You may be interested in your other planting guides for Royal Oak.