Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By using the USDA zone info for South San Francisco it's possible to estimate when it's the best time to plant armeria.

Planting Calendar for Armeria

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

Since armeria do well in cold you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant armeria in South San Francisco 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 armeria and expect a good harvest is probably October. If you wait any later than that and your armeria may not have a chance to grow to maturity. If you are starting your armeria indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average all chance of frost has passed is on January 31 in South San Francisco. You can expect an average low temperature of 30°F in the coldest months of winter.

Just be sure to remember that USDA zone info for South San Francisco is an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in South San Francisco there is a last frost after January 31 be ready to protect your armeria if you have a late frost.

USDA Zone Info for South San Francisco

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 South San Francisco

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