One of the first steps you take when you are estimating 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.

One way of figuring out when it's a good idea to plant oregano is to look at the USDA zone info for National City.

Planting Calendar for Oregano

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

Since oregano do well in moderate cold you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant oregano 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 oregano and expect a good harvest is probably October. Any later than that and your oregano may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your oregano 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.

Since the USDA zone info for National City is just an average the actual date of last frost is different every year. Since half of the time in National City you get surprised by a frost after January 31 be ready to cover your oregano 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.