The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of figuring out when it's the best time to plant periwinkles is to consult the USDA zone info for Uniontown.

Planting Calendar for Periwinkles

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

Since periwinkles do not do well in cold weather you have to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant periwinkles in Uniontown 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. Starting your periwinkles indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Uniontown. You can expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for Uniontown is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Uniontown last frost occurs after April 15 so make sure that you are ready to cover your periwinkles in the event of a late frost.

USDA Zone Info for Uniontown

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°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 0°F.

Plants to Grow in Uniontown

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