The USDA Zone info is a great tool for gardeners to help us estimate 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.

In Cerritos you can figure out when it's a good idea to plant rosemary by referring to the USDA zone info.

Planting Calendar for Rosemary

Frost tolerance for rosemary:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since rosemary are very cold tolerant you can plant them earlier in the year than more sensitive plants.

The earliest that you can plant rosemary in Cerritos 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 rosemary and expect a good harvest is probably October. You probably don't want to wait any later than that or else your rosemary may not have a chance to grow to maturity. Starting your rosemary indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

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

Always keep in mind that USDA zone info for Cerritos is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Cerritos it frosts late in the year after January 31 be ready to cover your rosemary in the event of a late frost.

USDA Zone Info for Cerritos

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 Cerritos

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