One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

The USDA zone info for Palmetto should be used to estimate when it's possible to plant spearmint.

Planting Calendar for Spearmint

Frost tolerance for spearmint:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Spearmint do well in cold which means that you can get them planted much earlier than plants that are more sensitive to the cold.

The earliest that you can plant spearmint in Palmetto 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 spearmint and expect a good harvest is probably October. You probably don't want to wait any later than that or else your spearmint may not have a chance to fully mature. If you are starting your spearmint indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Palmetto. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for Palmetto is not always accurate and the actual date of last frost changes from year to year. Half of the time in Palmetto it frosts late in the year after February 15 so make sure that you are ready to cover your spearmint in the event of a surprise 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.