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Master Gardeners


 Science based solutions for Colusa County's gardening communities.

The UCCE Master Gardeners of Colusa County volunteer's donated 705 hours and made 736 face to face contacts in 2018/19.

Since 2009, we have volunteered 6,475 hours and made 12,154 face to face contacts in Colusa County.


This is what we do!



Wreath Workshop

Make a holiday wreath with the UC Master Gardeners of Colusa County.

All supplies will be supplied.

Save the date!

Saturday, December 7

10 am to noon

Colusa County Fairgrounds, Community Building, Colusa

Click here to pay.

Wreath workshop 19



Need help identifying insects and how to get rid of them? The UC IPM (Integrated Pest Management) has answers!

UC IPM website


November in the Garden

November garden tasks: 

  • You can still sow seeds of wildflowers this month. Plant California poppy, calendula, clarkia, and sweet peas.
  • In the veggie garden plant seeds for lettuce, mustard, spinach, radishes and peas.
  • If you didn’t get your new tree planted last month, it is not too late to take advantage of the fall root growth that will give your new tree a strong start in the spring.
  • Look at your camellias and remove excess buds to get larger flowers.
  • In the middle of the month fertilize the veggies and flowers that were planted in October.


Also, this is the time to plant the chilled bulbs, and the spring flowering tubers and corms. Clean up all the fallen/falling leaves and other plant debris and dispose of diseased materials.


Asian Citrus Psyllid

Asian Citrus Psyllid is an insect that carries a devastating disease in Citrus trees and there is no cure. The insect and disease is usually detected in home citrus first. Click here to read more about the Asian Citrus Psyllid and the Huanglongbing disease.

The Asian Citrus Psyllid has been found in San Joaquin County.

Click here to read about the Asian Citrus Psyllid from the UCCE Master Gardeners of San Joaquin County.

Click here for Spanish


UC Master Gardeners of Colusa County



The University of California Master Gardener Program provides the public with UC research-based information about home horticulture, sustainable landscape and pest management practices. The program is administered by local University of California Cooperative Extension (UCCE) county offices that are the principal outreach and public service arms of the University’s division of Agriculture and Natural Resources.

The UC Master Gardener program supports sustainable gardening practices that protect the environment, conserve natural resources, and take into consideration each gardener's lifestyle and goals.


What do UC Master Gardeners do?

UC Master Gardeners are trained to help residents of California become better gardeners. Using a variety of activities such as workshops, lectures, and garden hotlines these volunteers answer questions about home horticulture, sustainable landscaping, and integrated pest management using University of California research-based information.

After their training UC Master Gardeners are qualified to help the public with problems in areas such as:

  • Weed Control
  • Plant Problem Diagnosis
  • Integrated Pest Management (insect and pest control)
  • Soils, fertilizers and irrigation
  • Selecting and caring for fruit and landscape trees
  • Growing annuals, perennials and food crops
  • Lawn care
  • Vegetable Gardening
  • Plant Pathology
  • Composting


Each county develops programs to address local needs. Some typical activities are:

  • Using mass media to disseminate gardening information
  • Teaching workshops, or lecturing on gardening practices
  • Participating in research activities with academics within UC
  • Answering gardeners’ questions via email or helplines
  • Speaking to the public on horticultural and gardening topics
  • Manning county fair information booths
  • Consulting with gardeners to improve their landscape practices


Find us on Facebook

Event Name Date
Garden Advice and Workshops

Second Saturday at the Library

10 am to noon

Colusa Library, Colusa

Garden Chat with the Master Gardeners

Last Tuesday of the month

1-2 pm

Arbuckle Library, Arbuckle



Master Gardener Blog