Colusa County
University of California
Colusa County

Master Gardeners


 Science based solutions for Colusa County's gardening communities.

The UCCE Master Gardeners of Colusa County volunteer's donated 802 hours and made 1458 face to face contacts in 2014/15.


This is what we do!

Click here for a short video!


Want to become a UCCE Master Gardener of Colusa County?

Are you looking for the UCCE Master Gardener of Colusa County application? Please click on the "Want to be a Master Gardener" tab on the left hand column.


Succulent workshop

When: Wednesday September 28, 6-8pm

Where: 9th and Pendleton, Arbuckle (United Methodist Church)

Fee: $25 fee, includes container, plants and soil

Deadline to register, Wednesday September 21 or when the class is full!

You must pre-pay.

To register and pay click here.


Lawn Watering Table

Lawn watering a

September in the Garden

What to plant:

  • Cool-Weather annuals like pansies, violas, snapdragons can be transplanted now.
  • Also, transplants of broccoli, cabbage, cauliflower, and kale can be planted this month.
  • Direct seed peas, spinach, radishes, lettuce, and carrots.


September Chores:

  • September is a good time to consider reducing the size of your lawn. It is also a good time to rejuvenate a lawn with over-seeding.
  • Put your spent annual and vegetables (disease-free, of course) in your compost pile.
  • Add compost to the beds that had the annuals and vegetables you are pulling out, before re-planting in those beds.


This is also the month to divide, and re-plant overgrown perennials that have finished blooming. Be sure to clear out any weeds that developed in the perennial bed.


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

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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


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Garden Advice and Workshops

Colusa Farmers Market

Thursdays, 4-7pm

Memorial Park, 10th & Market

Succulent workshop

Wednesday September 28, 6-8pm

9th & Pendleton, Arbuckle (United Methodist Church)



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California fescue


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Master Gardener Blog

UC IPM Offers Workshop for Retail Nurseries

Workshop participant looks at citrus leaves.

UC IPM is offering a one-day, hands-on, train-the-trainer workshop  designed especially for retail nursery and garden center employees, managers, owners, and affiliates. This workshop will help you and your employees gain new skills to better serve...

Posted on Wednesday, September 28, 2016 at 1:08 PM
Tags: ACP (16), Asian citrus psylld (3), garden center (4), HLB (14), household (1), huanglongbing (15), nursery (3), pesticides (15), pests (26), UCIPM (48)

Pesticide Safety Train-the-Trainer, Fall 2016

personal protective equipment

The UC IPM Pesticide Safety Program has scheduled a series of EPA-approved Pesticide Safety Instructor Training Workshops for this fall. Participants completing the training will be qualified to train both fieldworkers and pesticide handlers. Come learn...

Posted on Tuesday, September 27, 2016 at 11:14 PM

That Amazing Migrating Monarch Project

This migratory monarch, released Aug. 28 from Ashland, Ore. and tagged with  A6093, nectared on Mexican sunflower in Vacaville, Calif. on Sept. 5. (Photo by Kathy Keatley Garvey)

He may have been “born" in an Ashland, Ore., vineyard. But at least we know he hails from Ashland. That's what we learned about the male monarch that fluttered into our pollinator garden in Vacaville, Calif. on Monday, Sept. 5 (Labor Day) on his...

Posted on Tuesday, September 27, 2016 at 7:50 PM
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