One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of making a decision about when it's a good idea to plant periwinkles is to consult the USDA zone info for Atlantic Beach.

Planting Calendar for Periwinkles

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

Periwinkles are not cold tolerant which tells us that it's necessary to wait until it warms up after the last frost before you can plant them.

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

The last month that you can plant periwinkles and expect a good harvest is probably September. You probably don't want to wait any later than that or else your periwinkles may not have a chance to grow to maturity. If you are starting your periwinkles indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Atlantic Beach. In the coldest months of winter you can expect an average low temperature of 20°F.

Just be sure to remember that USDA zone info for Atlantic Beach is not always accurate and the actual date of last frost changes from year to year. Half of the time in Atlantic Beach you get a frost after February 15 so make sure that you are ready to protect your periwinkles in the event of one of those late frosts.

USDA Zone Info for Atlantic Beach

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 Atlantic Beach

You may be interested in your other planting guides for Atlantic Beach.