Before planting it is a good idea to find your USDA Zone info to estimate 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.

The USDA zone info for Piedmont should be used to determine when you can plant bunching onions.

Planting Calendar for Bunching Onions

Frost tolerance for bunching onions:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Bunching Onions do ok in moderate cold which tells us that you can plant them slightly earlier than more sensitive plants.

The earliest that you can plant bunching onions in Piedmont 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 bunching onions and expect a good harvest is probably August. Any later than that and your bunching onions may not have a chance to really do well. You can get started a few weeks earlier by starting your bunching onions indoors.

Last Frost Date

In Piedmont the average date of last frost happens on April 15. You can expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Piedmont may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Piedmont you get surprised by a frost after April 15 so make sure that you are prepared to protect your bunching onions if you have a 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.