Sonoma County
University of California
Sonoma County

Specialty Crops

PV cropped with tree
Paul Vossen, Farm Advisor

Paul Vossen has been a Farm Advisor in Sonoma County for over 25 years. He works with the county's 800 small-scale commercial farmers who grow olives, tree fruits, nuts, berries, vegetables, herbs, cut flowers, and other specialty crops on about 8,000 acres. His goal is to help farmers, processors, and marketers make a profit in local agriculture while promoting sustainable practices. His research and educational program emphasizes crop diversity. He also manages the 200 volunteers in the Master Gardener Program who help educate home gardeners about pest management and good cultural practices.


Food Safety for Small-scale Farmers

Growing Fruit Trees on a Small Scale in Sonoma and Marin Counties

December 13 and 20, 2011 Seminar Presentations

What to Grow for Profit in Sonoma County

June 4, 2010 Seminar Presentations


Land Feasibility Criteria handout

Key points in evaluating the potential profitability of farm lands for growing edible crops.
Land Feasibility PowerPoint

NEW PEST: Spotted Wing Drosophila (SWD)

Gopher and Mole Control

Gardening and Horticulture Resources

University of California Agricultural Cost Studies

Arbequina I-18

Research projects:

  • Olive harvest efficiency trials
  • Oil olive variety evaluation
  • Olive fruit fly control trials
  • Olive production cost studies
  • Olive oil industry grower, acreage, and production survey
  • Oil olive irrigation study
  • Super high density olive orchard evaluation studies
  • Blueberry variety demonstration orchard
  • Apple variety demonstration orchard
  • Chestnut variety demonstration orchard
  • Codling moth control in back yard trees
  • UC olive oil research sensory taste panel

Educational programs:

  • Organic olive production short courses
  • Annual olive oil sensory short course at UC Davis
  • Annual landscape fruit tree pruning course at UC Davis
  • Olive oil production, processing, and sensory evaluation course at SRJC
  • Statewide olive oil production short courses
  • One-on-one meetings with county farmers
  • Specialty crops production short course at the SRJC
  • Pruning demonstrations for olives and fruit trees
  • Quarterly First Press newsletter of olive oil production and evaluation

First Press: Newsletter of Olive Oil Production and Evaluation

University of California Cooperative Extension, Sonoma County
133 Aviation Blvd Suite 109, Santa Rosa, CA 95403  Phone: 707.565.2621  Fax: 707.565.2623
Office Hours:  M-F, 8am-11am & 1pm-4pm

Like us on Facebook: UCCE Sonoma                        Follow us on Twitter @UCCESonoma 

Webmaster Email: