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

In Charleston you can estimate when it's possible to plant salsify by reviewing the USDA zone info.

Planting Calendar for Salsify

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

Salsify are barely cold tolerant which means that you can start planting them slightly earlier than plants that are more sensitive to the cold.

The earliest that you can plant salsify 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 salsify and expect a good harvest is probably September. You probably don't want to wait any later than that or else your salsify may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your salsify indoors.

Last Frost Date

In Charleston the average date of last frost happens on February 15. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Charleston is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Charleston it frosts late in the year after February 15 so make sure that you are prepared to protect your salsify in the event of one of those late frosts.

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.