patrick.net

http://www.sfgate.com/bayarea/article/Why-groceries-cost-more-in-the-Bay-Area-5122461.php

half of the country's fresh fruits and vegetables are grown in California. About three-fourths of some products - lettuce, broccoli, cauliflower, fresh oranges and most leafy greens - are grown in California, as are an even higher percentage of fresh strawberries and raspberries.

But that proximity to the source doesn't necessarily translate to lower prices because produce labeled and marketed as "local" can be sold at premium prices to consumers who are willing to spend more to support area businesses.