The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to figure out when it's possible to plant flowering kale by referring to the USDA zone info for National City.

Planting Calendar for Flowering Kale

Frost tolerance for flowering kale:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Flowering Kale tend to make it in moderate cold which means that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant flowering kale in National City is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant flowering kale and expect a good harvest is probably October. You probably don't want to wait any later than that or else your flowering kale may not have a chance to really do well. If you are starting your flowering kale indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on January 31 in National City. In the coldest months of winter you can expect an average low temperature of 35°F.

Since the USDA zone info for National City is just an average the actual date of last frost is different every year. Half of the time in National City last frost occurs after January 31 so be sure to be ready to cover your flowering kale in the event of a surprise late frost.

USDA Zone Info for National City

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°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 40°F.

Plants to Grow in National City

You may be interested in your other planting guides for National City.