Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when to plant nigella in Skiatook by using the USDA zone info.

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 earlier in the year than other frost tender plants.

The earliest that you can plant nigella in Skiatook 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 fully mature. You can get started a few weeks earlier by starting your nigella indoors.

Last Frost Date

The average date of last frost is April 15 in Skiatook. You can expect an average low temperature of 0°F in the coldest months of winter.

Keep in mind that USDA zone info for Skiatook may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Skiatook there is a last frost after April 15 so make sure that you are ready to protect your nigella in the event of a late frost.

USDA Zone Info for Skiatook

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 Skiatook

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