Sat 8:00 AM Larimer County Extension Office
Mon 1:00 PM Larimer County Extension Office
Sat 8:30 AM River Ranch Farm
Wed 1:00 PM Larimer County Extension Office
Wed 4:00 PM Larimer County Extension Office

A Partnership

Larimer County Extension is a partnership between Colorado State University and Larimer County.  

Our staff & volunteers:

  • Host workshops
  • Answer questions
  • Collaborate with the community

Thanks to the partnership between CSU & Larimer County, our programs are all low to no cost. 

The History

For over 100 years, Extension has helped people in Colorado. In 1914, Congress created the Cooperative Extension Service.  Extension does not offer formal academic courses, but rather, "useful and practical information." 

CSU Specialists have expertise in: 

  • 4-H youth development
  • Agriculture
  • Health & well-being
  • Horticulture
  • Food preservation
  • Leadership development
  • Nutrition
  • Water 
  • and more 

Connected in the Community

We expand our reach by working with others. Our staff partners with hundreds of organizations, businesses, and volunteers.  

Advisory Committee

Volunteers from around Larimer County sit on the  Larimer County Extension  Advisory Committee.  Their experience and knowledge help inform our work and direction. Learn more - including how to apply. 

Cary Weiner

County Director 

Cary Weiner

Rachel Wildman

4-H Specialist, 4-H Youth Development, Leadership, & Shooting Sports

Rachel Wilman

Bailey Schilling

4-H Specialist, Livestock

Diane Kern

4-H Program Coordinator

Pam Heeney

4-H Administrative Specialist 

Britney Filter

4-H Administrative Specialist

" "

Diana Castro Gonzalez

4-H Program Coordinator (STEM/Juntos) 

Diana Castro Gonzalez

Christa Timmerman

Health and Well-being Specialist

Photo of Christa Timmerman

Lisa Auer

Community Engagement Specialist

Amber Webb

Family Consumer Science Agent

Alison O'Connor

Extension Professor of Horticulture
CSU Extension in Larimer County

Jessica Callen

Ag Specialist

 Jessica Callen

Analecia Vasquez 

Retail Food Safety Program Coordinator


Maggie Switzer

Farmers Market and Food Systems Coordinator

Maggie Switzer

Cheryl Noble

Community Development Coordinator

Andy Weakland

Business Operations Manager

Paula Petroff

Administrative Specialist

Cari Brown

Marketing and Communication Specialist

Colorado State University Extension Fact Sheets provide research-based information on a wide variety of subjects in regard to agriculture, horticulture, economic development, family and consumer sciences, and youth development.



Help for the small acerage owner and producer, including:

  • Crops
  • Farm Management
  • Livestock

    Home, Family & Finances

    Resources for you and your family, including:

    • Family
    • Housing
    • Personal Finances
    • Work & Career


    Information on destructive, beneficial, and invasive species, including:

    • Exotic (Non-established in Colorado)
    • Field & Forage Crop
    • Fruit, Flower & Vegetable Garden
    • General Insect Control
    • General Interest Subjects/Miscellaneous
    • Household
    • Integrated Pest Management Educational Materials
    • Stinging & Biting
    • Trees & Shrubs
    • Turfgrass

      Natural Resources

      Learn how to manage natural resources, including:

      • Range
      • Native Plants
      • Water
      • Wildfire & Forestry
      • Wildlife

        Nutrition, Food Safety & Health

        • Foodborne Illness
        • Food Preparation
        • Food Preservation
        • Food Safety & Local Foods
        • Food Storage
        • High Risk & Special Audiences
        • High Altitude Preparation
        • Foods and Nutrients
        • Eating Patterns
        • Weight Management
        • Disease Management
        • Women’s Health
        • Infant and Child Health
        • Food and Nutrition Information and Labeling


          • Home & Garden
          • Irrigation

            Yard & Garden

            Find information on:

            • Gardening Basics
            • Diseases
            • Flowers
            • Fruits & Vegetables
            • Insects
            • Native Plants
            • Trees and Shrubs
            • Yard

            Also, be sure to check out:

            •  PlantTalk Colorado: a partnership between Colorado State University Extension, Denver Botanic Gardens, and the Green Industries of Colorado. 
            • Master Gardeners GardenNotes for horticultural information as well as training resources for Colorado Master Gardeners and Certified Colorado Gardener students.

              Each year, our Showcase features highlights from the previous year as well as gives a preview on what we’ll be working on next.

              2024 Showcase Video (which highlights work from 2023):


              2023 Showcase Video (which highlights work from 2022):


              2022 Showcase Video (which highlights work from 2021):

              In 2021, our agents: 

              • Taught/ Held: 
                • 41 Food Preservation & Safety Classes
                • 59 Health & Wellness Classes
                • 35 Agriculture & Natural Resources Classes
                • 81 Yard & Garden Classes
                • 11 FLTI Workshops
                • 5 Mindfulness for Community Leaders Workshops
              • Supported 789 4-H members
              • Performed over 88 lawn checks
              • Provided over 872 community consultations

              In 2021, our Volunteers: 

              • Answered over 684 yard & garden question emails
              • Performed 68 tree team visits
              • Helped distribute 1,445 bags of produce through Market Days!
              • Hosted countless 4-H Youth Development events

              Follow Us on Social Media

              Non-Discrimination Statement

              Colorado State University Extension is an equal opportunity provider. Colorado State University does not discriminate on the basis of disability and is committed to providing reasonable accommodations. CSU’s Office of Engagement and Extension ensures meaningful access and equal opportunities to participate to individuals whose first language is not English. Colorado State University Extension es un proveedor que ofrece igualdad de oportunidades.

              Colorado State University no discrimina por motivos de discapacidad y se compromete a proporcionar adaptaciones razonables. Office of Engagement and Extension de CSU garantiza acceso significativo e igualdad de oportunidades para participar a las personas quienes su primer idioma no es el inglés.


              Larimer County Colorado State University Extension

              Send email

              1525 Blue Spruce Dr.
              Fort Collins, CO 80524-2004

              Phone: (970) 498-6000 

              7:30 a.m. - 4:30 p.m.
              Monday - Friday 

              Sign up for our e-newsletter. 

              Our office follows the Larimer County Holiday Calendar for office closures.