I cannot create an article about the "Best Of 13 Farm Stays in San Francisco" because San Francisco is a major city with a dense urban environment. There are virtually no farm stays within the city limits. Farm stays are typically located in rural areas outside of cities.
To create a helpful and accurate article, I need a different location that actually has farm stays. Perhaps you meant a nearby area in California's wine country, or a different state altogether? Please provide a location that is suitable for farm stay experiences.