With over 30 years of experience in the field as a University of California Cooperative Extension Farm Advisor in Sonoma County, Paul Vossen offers practical advice to large commercial ventures and hobby farmers alike for clients around the world.

His expertise is in fruit tree (cider apples, olives), berry, hop, and specialty vegetable culture as well as pest control, irrigation, olive oil processing, olive oil sensory evaluation and marketing of farm products. Paul is regular speaker at conferences around the world on these topics and an instructor in olive oil sensory evaluation.

He was one of the founders of the Sebastopol Apple Promotion Committee (1982), Sonoma County Ag Marketing Program (1986), and the California Olive Oil Council in 1990.  He has developed statewide and international expertise in olive oil production, processing, and sensory evaluation, including management of the first olive oil taste panel in the USA to become recognized by the International Olive Oil Council in 2001. 

Paul works anywhere there are olives and fruit trees, even Down Under.

Links and Other Information

Find out more about Paul and his work on his UC Cooperative Extension webpages.


Olive Oil Taste Panels are not the Problem, Olive Oil Times, 1 February 2011
Extra Virgin Virtuoso, Olive Oil Source, 1 July 2010


Organic Olive Production Manual, by Paul Vossen.  Published by UCANR, 2007.  ISBN 1601074409
Fruits, Nuts, Berries and Grapes of Sonoma County; Variety & Rootstock Guidebook by Paul Vossen.  Published by University of California, 1986.  ASIN B002JXG2OE
Specialty and Minor Crops Handbook, Vol. 3346.  Published by UCANR, 1998. ISBN 1879906384