The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when to plant nigella is to consult the USDA zone info for Ogden.

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 one of those plants that can tolerate quite a bit of cold weather you can plant them earlier in the year than other frost tender plants.

The earliest that you can plant nigella in Ogden 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 fully mature. Starting your nigella indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Ogden. You can expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Ogden is an average the actual date of last frost changes from year to year. Half of the time in Ogden you get surprised by a frost after April 15 so make sure that you are prepared to protect your nigella if you have a surprise late frost.

USDA Zone Info for Ogden

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 Ogden

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