The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. 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 figure out when to plant skullcap by looking at the USDA zone info for Carrboro.

Planting Calendar for Skullcap

Frost tolerance for skullcap:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Skullcap are not cold tolerant which tells us that it is important to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant skullcap in Carrboro is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant skullcap and expect a good harvest is probably August. If you wait any later than that and your skullcap may not have a chance to fully mature. Starting your skullcap indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Carrboro. You can expect an average low temperature of 5°F in the coldest months of winter.

Since the USDA zone info for Carrboro is not always accurate the actual date of last frost is different every year. Since half of the time in Carrboro last frost occurs after April 15 be ready to protect your skullcap in the event of one of those late frosts.

USDA Zone Info for Carrboro

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 Carrboro

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