The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. 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 estimate when you can plant arctotis by looking at the USDA zone info for South San Francisco.

Planting Calendar for Arctotis

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

Arctotis do ok in mild cold which means that you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant arctotis 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 arctotis and expect a good harvest is probably October. You probably don't want to wait any later than that or else your arctotis may not have a chance to fully mature. If you are starting your arctotis indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is January 31 in South San Francisco. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for South San Francisco may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in South San Francisco you get surprised by a frost after January 31 be ready to protect your arctotis 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.