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.

One way of getting a good idea when it's a good idea to plant hemerocallis is to examine the USDA zone info for South San Francisco.

Planting Calendar for Hemerocallis

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

Hemerocallis do ok in some cold which means that you can plant them a bit earlier in the year than more sensitive plants.

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

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in South San Francisco. In the coldest months of winter you can 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 can change quite a bit from year to year. Half of the time in South San Francisco you get a frost after January 31 so always be ready to cover your hemerocallis in the event of a 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.