One of the first steps you take when you are estimating 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.

It's possible to determine when to plant nigella by checking out the USDA zone info for Wisconsin Rapids.

Planting Calendar for Nigella

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

Since nigella are very cold tolerant you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant nigella in Wisconsin Rapids 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 nigella and expect a good harvest is probably August. You probably don't want to wait any later than that or else your nigella may not have a chance to grow to maturity. Starting your nigella indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Wisconsin Rapids. In the coldest months of winter you should expect an average low temperature of -25°F.

Since the USDA zone info for Wisconsin Rapids is just an average the actual date of last frost will vary from year to year. Since half of the time in Wisconsin Rapids last frost occurs after May 15 be ready to cover your nigella if you have a surprise late frost.

USDA Zone Info for Wisconsin Rapids

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Wisconsin Rapids

You may be interested in your other planting guides for Wisconsin Rapids.