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.

The best time to plant blue lace flowers in Charleston can be estimated by checking out the USDA zone info.

Planting Calendar for Blue Lace Flowers

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

Blue Lace Flowers are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than other plants that might not handle the cold.

The earliest that you can plant blue lace flowers 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 blue lace flowers and expect a good harvest is probably September. You probably don't want to wait any later than that or else your blue lace flowers may not have a chance to grow to maturity. Starting your blue lace flowers indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Charleston the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Charleston may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Charleston last frost occurs after February 15 be ready to protect your blue lace flowers 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.