Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to determine when it's possible to plant four o' clock by referring to the USDA zone info for Piedmont.

Planting Calendar for Four O' Clock

Frost tolerance for four o' clock:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant four o' clock until after the last frost because they require warm weather.

The earliest that you can plant four o' clock in Piedmont 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 four o' clock and expect a good harvest is probably August. If you wait any later than that and your four o' clock may not have a chance to grow to maturity. If you are starting your four o' clock indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Piedmont the average date of last frost happens on April 15. It might get as low as 0°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Piedmont may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Piedmont you get surprised by a frost after April 15 be ready to protect your four o' clock if you have a surprise late frost.

USDA Zone Info for Piedmont

Here is the info for USDA Zone 7a.

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

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Piedmont

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