This is an interesting article....these cold hardy greens can be grown throughout the winter months in the Bay Area.
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A Cook's Garden
In Winter, Try Expanding Your Salad Vocabulary
By Barbara Damrosch
In Winter, Try Expanding Your Salad Vocabulary
By Barbara Damrosch
Special to The Washington Post
Thursday, January 8, 2009

Our household, reluctant to give up the habit of homegrown produce, relies on an unheated greenhouse for a winter supply of spinach, mache, tatsoi and other greenery. (A large cold frame or two would also serve well.) Yet in the darkness of early winter, the growth of leafy crops slows way down, and our usual definition of salad expands to include something extra hearty and fortifying. At dinnertime I poke through cellar, larder and fridge looking for inspiration close at hand.