One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to estimate when it's the best time to plant cerastium by using the USDA zone info for Irvine.

Planting Calendar for Cerastium

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

Cerastium do ok in moderate cold which tells us that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant cerastium in Irvine 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. If you wait any later than that and your cerastium may not have a chance to really do well. You can get started a little bit earlier by starting your cerastium indoors.

Last Frost Date

On average the last frost has passed is on January 31 in Irvine. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Irvine is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Irvine you get a frost after January 31 so make sure that you are prepared to cover your cerastium if you have a surprise late frost.

USDA Zone Info for Irvine

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Irvine

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