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.

The first opportunity to plant garden mums in San Francisco should be determined by checking out the USDA zone info.

Planting Calendar for Garden Mums

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

Garden Mums are moderately cold tolerant which tells us that you can get them planted earlier than other frost tender plants.

The earliest that you can plant garden mums 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 garden mums and expect a good harvest is probably October. Any later than that and your garden mums may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your garden mums indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in San Francisco. In the coldest months of winter you should expect an average low temperature of 35°F.

Keep in mind that USDA zone info for San Francisco is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in San Francisco you get a frost after January 31 so make sure that you are ready to protect your garden mums if you have a surprise 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.