One of the best tools that you have as gardeners to help us figure out 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.

You should be able to figure out when it's the best time to plant cerastium by using the USDA zone info for San Anselmo.

Planting Calendar for Cerastium

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

Since cerastium are moderately cold tolerant you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant cerastium in San Anselmo 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 cerastium and expect a good harvest is probably October. Any later than that and your cerastium may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your cerastium indoors.

Last Frost Date

The average date of last frost is February 15 in San Anselmo. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for San Anselmo is an average the actual date of last frost changes from year to year. Since half of the time in San Anselmo it frosts late in the year after February 15 be ready to cover your cerastium if you have one of those late frosts.

USDA Zone Info for San Anselmo

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in San Anselmo

You may be interested in your other planting guides for San Anselmo.