For comparison, the Times also has a map showing the locations of all farms in the US:
Says the Grey Lady:
The map of organic farms in the United States is clustered into a few geographic centers, a strikingly different pattern than the map of all farms, which spreads densely over many regions, breaking only for the Rockies and Western deserts [sic].I leave it to the reader to decide if there's a significant correlation between the map of organic farms and this map.
Areas in the Northeast and Northwest have many small organic farms that sell produce directly to consumers. Large organic farms, which some call organic agribusiness, have flourished in California.