The USDA Zone info is a great tool for gardeners to help us estimate 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.

One way of getting a good idea when it's a good idea to plant calibrachoa is to use the USDA zone info for Clarksville.

Planting Calendar for Calibrachoa

Frost tolerance for calibrachoa:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Calibrachoa do well in mild cold which means that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant calibrachoa in Clarksville 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 calibrachoa and expect a good harvest is probably August. Any later than that and your calibrachoa may not have a chance to fully mature. You can get started a few weeks earlier by starting your calibrachoa indoors.

Last Frost Date

The average date of last frost is April 15 in Clarksville. In the coldest months of winter you should expect an average low temperature of 5°F.

Keep in mind that USDA zone info for Clarksville is just an average and the actual date of last frost changes from year to year. Half of the time in Clarksville you get surprised by a frost after April 15 so make sure that you are prepared to cover your calibrachoa in the event of one of those late frosts.

USDA Zone Info for Clarksville

Here is the info for USDA Zone 7b.

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

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

Plants to Grow in Clarksville

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