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

One way of making a decision about when to plant periwinkles is to examine the USDA zone info for Biloxi.

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 require warm weather which means that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant periwinkles in Biloxi 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. If you wait any later than that and your periwinkles may not have a chance to grow to maturity. Starting your periwinkles indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Biloxi. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Biloxi is just an average the actual date of last frost will vary from year to year. Half of the time in Biloxi it frosts late in the year after February 15 so always be ready to protect your periwinkles if you have one of those late frosts.

USDA Zone Info for Biloxi

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 Biloxi

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