One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for National City can be looked at to estimate when you can plant carrots.

Planting Calendar for Carrots

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

Carrots can survive in some cold which means that you can plant them a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant carrots 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 carrots and expect a good harvest is probably October. If you wait any later than that and your carrots may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your carrots indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in National City. In the coldest months of winter you should expect an average low temperature of 35°F.

It's important to remember that USDA zone info for National City is just an average and the actual date of last frost changes from year to year. Half of the time in National City there is a last frost after January 31 so make sure that you are prepared to cover your carrots if you have a 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.