The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to figure out when to plant nigella by looking at the USDA zone info for Norcross.

Planting Calendar for Nigella

Frost tolerance for nigella:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since nigella do well in cold you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant nigella in Norcross is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant nigella and expect a good harvest is probably September. Any later than that and your nigella may not have a chance to really do well. If you are starting your nigella indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on March 15 in Norcross. You can expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Norcross may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Norcross it frosts late in the year after March 15 be ready to protect your nigella if you have a late frost.

USDA Zone Info for Norcross

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Norcross

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