The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Signal Hill you can estimate when you can plant ajuga by checking out 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 are very cold tolerant which tells us that you can plant them a quite a bit earlier than plants that are more sensitive to the cold.

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

The last month that you can plant ajuga and expect a good harvest is probably October. You probably don't want to wait any later than that or else your ajuga may not have a chance to really do well. If you are starting your ajuga indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Signal Hill the average date of last frost happens on January 31. You should expect an average low temperature of 35°F in the coldest months of winter.

Since the USDA zone info for Signal Hill is an average the actual date of last frost changes from year to year. Since half of the time in Signal Hill there is a last frost after January 31 be ready to protect your ajuga if you have a late frost.

USDA Zone Info for Signal Hill

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Signal Hill

You may be interested in your other planting guides for Signal Hill.