One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. 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 lupine in South San Francisco by reviewing the USDA zone info.

Planting Calendar for Lupine

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

You can plant lupine just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant lupine 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 lupine and expect a good harvest is probably October. Any later than that and your lupine may not have a chance to really do well. Starting your lupine indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Just be sure to remember that USDA zone info for South San Francisco is an average and the actual date of last frost is different every year. Since half of the time in South San Francisco there is a last frost after January 31 be ready to protect your lupine if you have one of those late frosts.

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.