One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Tomball you can figure out when it's the best time to plant ajuga by looking at 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.

Since ajuga do well in cold you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant ajuga in Tomball 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. If you wait any later than that and your ajuga may not have a chance to grow to maturity. Starting your ajuga indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Tomball. In the coldest months of winter you can expect an average low temperature of 20°F.

Just be sure to remember that USDA zone info for Tomball is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Tomball there is a last frost after February 15 so make sure that you are ready to cover your ajuga if you have a late frost.

USDA Zone Info for Tomball

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Tomball

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