The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can figure out when it's the best time to plant turnips in San Francisco by looking at the USDA zone info.

Planting Calendar for Turnips

Frost tolerance for turnips:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

You can not plant turnips until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant turnips in 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 turnips and expect a good harvest is probably September. You probably don't want to wait any later than that or else your turnips may not have a chance to grow to maturity. You can get started a little bit earlier by starting your turnips indoors.

Last Frost Date

In San Francisco the average date of last frost happens on January 31. It might get as low as 35°F during the coldest months of winter.

Keep in mind that USDA zone info for San Francisco is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in San Francisco there is a last frost after January 31 be ready to cover your turnips if you have a late frost.

USDA Zone Info for San Francisco

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in San Francisco

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