The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Charleston you can figure out when you can plant lemon balm by checking out the USDA zone info.

Planting Calendar for Lemon balm

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

You can plant lemon balm just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant lemon balm in Charleston is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant lemon balm and expect a good harvest is probably September. Any later than that and your lemon balm may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your lemon balm indoors.

Last Frost Date

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

It's important to remember that USDA zone info for Charleston is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Charleston last frost occurs after February 15 be ready to cover your lemon balm if you have a surprise late frost.

USDA Zone Info for Charleston

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 Charleston

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