The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for South San Francisco can be looked at to figure out when to plant garlic.

Planting Calendar for Garlic

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

Garlic do well in quite a bit of cold which means that you can plant them much earlier in the year than other frost tender plants.

The earliest that you can plant garlic 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 garlic and expect a good harvest is probably October. You probably don't want to wait any later than that or else your garlic may not have a chance to really do well. Starting your garlic indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in South San Francisco. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for South San Francisco is an average the actual date of last frost will vary from year to year. Half of the time in South San Francisco you get a frost after January 31 so make sure that you are prepared to cover your garlic in the event of a surprise 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.