When can I plant Ajuga in Zone 4a

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

The first opportunity to plant ajuga in Zone 4a can be figured out by reviewing the USDA zone info.


Planting Calendar for Ajuga

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

You can plant ajuga earlier in the year because they are very cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant ajuga
Possibly ok, but a risky time to plant ajuga
Probably not a good time to plant ajuga

The earliest that you can plant ajuga in Zone 4a 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 fully mature. Starting your ajuga indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Zone 4a. In the coldest months of winter we can expect an average low temperature of -30°F.

Since the USDA zone info for Zone 4a is an average our actual date of last frost changes from year to year. Since half of the time in Zone 4a there is a last frost after May 15 be ready to protect your ajuga if we have one of those late frosts.

USDA Zone Info for Zone 4a

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-30°F
Highest Expected Low-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Zone 4a

You may be interested in our other planting guides for Zone 4a.