One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Palmetto you can estimate when it's a good idea to plant lemon balm by looking at 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.

Since lemon balm are one of those plants that can tolerate a tiny bit of cold weather you can plant them just a tiny bit earlier in the year than more sensitive plants.

The earliest that you can plant lemon balm in Palmetto 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 grow to maturity. You can get started a little bit earlier by starting your lemon balm indoors.

Last Frost Date

In Palmetto the average date of last frost happens on February 15. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Palmetto is just an average the actual date of last frost will vary from year to year. Half of the time in Palmetto it frosts late in the year after February 15 so just be sure to be ready to cover your lemon balm in the event of a late frost.

USDA Zone Info for Palmetto

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Palmetto

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