Are you looking for hard to find farmers market items and not finding them? Perhaps The Guide to Local and Seasonal Products can help.
There is a print version, but better yet is the online version, which is always up-to-date, because it can be updated at any point by farmers. You can search through the over 6 screens (!) of produce, meats and dairy items, figure out which farms grow or raise them, and from there, figure out which farmers markets you need to hit to get what you're looking for. Brilliant, no?
While this is definitely more geared to restaurant buyers, I found it very useful.
The Guide to Local and Seasonal Products — used to both buy and sell product — has become an indispensable part of doing business for producers and buyers alike.
Participating farmers, ranchers and fishermen are categorized by the products they sell as well as listed alphabetically. This makes it easy for buyers to look up a product, such as beets or salmon, and then cross reference the index to obtain contact information as well as details about a seller's product.
Available in print and on-line, and updated annually, the 2006 Guide to Local and Seasonal Products includes expanded Oregon and Washington listings.