Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when you can plant tomatos in South San Francisco by reviewing the USDA zone info.

Planting Calendar for Tomatos

Frost tolerance for tomatos:	Not tolerant of frost.
When to plant:	After the last frost.

Tomatos do not do well in cold weather which means that it's necessary to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant tomatos in South San Francisco is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant tomatos and expect a good harvest is probably September. If you wait any later than that and your tomatos may not have a chance to grow to maturity. You can get started a little bit earlier by starting your tomatos indoors.

Last Frost Date

In South San Francisco the average date of last frost happens on January 31. You can expect an average low temperature of 30°F in the coldest months of winter.

Keep in mind that USDA zone info for South San Francisco may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in South San Francisco you get a frost after January 31 so make sure that you are ready to cover your tomatos 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.