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.

A way of estimating when you can plant bellis is to look at the USDA zone info for San Francisco.

Planting Calendar for Bellis

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

Bellis tend to make it in a little bit of cold which means that you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant bellis in 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 bellis and expect a good harvest is probably October. Any later than that and your bellis may not have a chance to fully mature. If you are starting your bellis indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In San Francisco the average date of last frost happens on January 31. You should expect an average low temperature of 35°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for San Francisco and it changes 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 bellis 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.