Smart Microfarms continues to expand its spirulina greenhouse microfarm in Half Moon Bay south of San Francisco. This first Northern California spirulina farm was started in 2016 in Half Moon Bay, south of San Francisco, inside a large commercial glass greenhouse once used for growing flowers. We produce an all-natural product in a controlled environment, using no pesticides, herbicides or fungicides. The water source is Half Moon Bay city water, carbon filtered. With a Certified Producer Certificate for the CA Farmers Market Program, we sell in San Rafael, Oakland and Santa Cruz. Product is sold natural food stores in the SF Bay Area, direct to customers locally and online. Many customers prefer fresh spirulina to traditional dried spirulina. Fresh has almost no taste, and can be mixed with drinks and foods without changing the flavor. New fresh and fresh frozen spirulina appeals to locavores, fresh food and raw food consumers. April 24, 2017.