The USDA Zone info is a great tool for gardeners to help us estimate 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.

In South San Francisco you can figure out when it's a good idea to plant ornamental grasses by looking at the USDA zone info.

Planting Calendar for Ornamental Grasses

Frost tolerance for ornamental grasses:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Ornamental Grasses do ok in moderate cold which tells us that you can get them planted just a bit earlier than other plants that might not handle the cold.

The earliest that you can plant ornamental grasses 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 ornamental grasses and expect a good harvest is probably September. Any later than that and your ornamental grasses may not have a chance to grow to maturity. You can get started a little bit earlier by starting your ornamental grasses indoors.

Last Frost Date

On average the last frost has passed is on January 31 in South San Francisco. In the coldest months of winter you should expect an average low temperature of 30°F.

It's important to remember that USDA zone info for South San Francisco is just an average and the actual date of last frost changes from year to year. Since half of the time in South San Francisco it frosts late in the year after January 31 be ready to cover your ornamental grasses 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.