Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Clemson you can estimate when it's possible to plant alyssum by looking at the USDA zone info.

Planting Calendar for Alyssum

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

Alyssum can survive in cold weather which means that you can plant them earlier in the year than plants that are more sensitive to the cold.

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

Last Frost Date

The average date of last frost is March 15 in Clemson. You should expect an average low temperature of 10°F in the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Clemson and it will vary from year to year. Since half of the time in Clemson it frosts late in the year after March 15 be ready to cover your alyssum in the event of a late frost.

USDA Zone Info for Clemson

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Clemson

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