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

In Gadsden you can estimate when it's possible to plant periwinkles by referring to the USDA zone info.

Planting Calendar for Periwinkles

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

Since periwinkles are not cold tolerant you need to wait until after the last frost before you can plant them.

The earliest that you can plant periwinkles in Gadsden 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. 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 few weeks earlier.

Last Frost Date

On average the last frost is on March 15 in Gadsden. In the coldest months of winter you should expect an average low temperature of 10°F.

Keep in mind that USDA zone info for Gadsden is an average and the actual date of last frost will vary from year to year. Half of the time in Gadsden you get surprised by a frost after March 15 so always be ready to cover your periwinkles if you have one of those late frosts.

USDA Zone Info for Gadsden

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 Gadsden

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