One of the first steps you take when you are figuring out your gardening schedule is find your 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.

The USDA zone info for Berea can be looked at to figure out when you can plant nigella.

Planting Calendar for Nigella

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

Nigella do well in cold which tells us that you can plant them a quite a bit earlier than more sensitive plants.

The earliest that you can plant nigella in Berea 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. If you wait 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 couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Berea. In the coldest months of winter you can expect an average low temperature of -5°F.

Since the USDA zone info for Berea is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Berea last frost occurs after April 15 so always be ready to cover your nigella in the event of one of those late frosts.

USDA Zone Info for Berea

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 Berea

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