One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. 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 determining when it's possible to plant welsh onion is to use the USDA zone info for Mount Airy.

Planting Calendar for Welsh onion

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

Welsh onion do well in very little cold which tells us that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant welsh onion in Mount Airy 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 welsh onion and expect a good harvest is probably August. Any later than that and your welsh onion may not have a chance to really do well. Starting your welsh onion indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Mount Airy. You can expect an average low temperature of 0°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Mount Airy may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in Mount Airy it frosts late in the year after April 15 be ready to protect your welsh onion if you have a surprise late frost.

USDA Zone Info for Mount Airy

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 Mount Airy

You may be interested in your other planting guides for Mount Airy.