One of the first steps you take when you are determining 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 Detroit Lakes should be used to estimate when it's the best time to 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 weather which means that you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant nigella in Detroit Lakes 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. Any later than that and your nigella may not have a chance to fully mature. Starting your nigella indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Detroit Lakes. In the coldest months of winter you should expect an average low temperature of -35°F.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Detroit Lakes and it can change quite a bit from year to year. Half of the time in Detroit Lakes you get a frost after May 15 so make sure that you are ready to protect your nigella if you have a late frost.

USDA Zone Info for Detroit Lakes

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-35°F
Highest Expected Low	-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Detroit Lakes

You may be interested in your other planting guides for Detroit Lakes.