When can I plant Periwinkles in Zone 7b

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

By using the USDA zone info for Zone 7b you should be able to estimate when it's the best time to plant periwinkles.


Planting Calendar for Periwinkles

Frost tolerance for periwinkles: Not tolerant of frost.
When you should plant them: After the last frost has passed.

It's not a good idea to plant periwinkles until after the last frost when the weather gets warmer because they are not cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant periwinkles
Possibly ok, but a risky time to plant periwinkles
Probably not a good time to plant periwinkles

The earliest that you can plant periwinkles in Zone 7b 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 fully mature. Starting your periwinkles indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Zone 7b. In the coldest months of winter we can expect an average low temperature of 5°F.

Keep in mind that our actual date of last frost is an average because it is based on the USDA zone info for Zone 7b and it can change quite a bit from year to year. Half of the time in Zone 7b we get surprised by a frost after April 15 so make sure that you are prepared to protect your periwinkles if we have a surprise late frost.

USDA Zone Info for Zone 7b

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low5°F
Highest Expected Low10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Zone 7b

You may be interested in our other planting guides for Zone 7b.