One of the best tools that you have as gardeners to help us figure out 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.

It's possible to figure out when you can plant periwinkles by checking out the USDA zone info for Savannah.

Planting Calendar for Periwinkles

Frost tolerance for periwinkles:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant periwinkles until after the last frost has passed because they require warm weather.

The earliest that you can plant periwinkles in Savannah is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant periwinkles and expect a good harvest is probably August. Any later than that and your periwinkles may not have a chance to grow to maturity. You can get started a little bit earlier by starting your periwinkles indoors.

Last Frost Date

The average date of last frost is March 15 in Savannah. In the coldest months of winter you should expect an average low temperature of 15°F.

Remember that USDA zone info for Savannah is not always accurate and the actual date of last frost changes from year to year. Half of the time in Savannah you get surprised by a frost after March 15 so be sure to be ready to protect your periwinkles in the event of a late frost.

USDA Zone Info for Savannah

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Savannah

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