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 720 hours and made 977 face to face contacts in 2015/16.


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.


Make a Pumpkin Centerpiece!


Learn how to make a pumpkin centerpiece for your Thanksgiving table. The cute pumpkin centerpieces can also sit on your porch and welcome guests.

November 9, 6-8pm, Market Street Grill, 415 Market St., Colusa

Beverages and appetizers will be available for purchase from Market Street Grill.

$25 per person

Click here to pay.

October in the Garden

What to plant:

Þ Cool-weather annuals like pansies, violas, snapdragons can be transplanted now. Also, you can direct seed cornflower, nasturtium, poppy, nigella, portulaca and sweet peas.

Þ If you don’t have a winter garden, consider planting a cover crop to be tilled in next spring.

Þ Direct seed peas, spinach, radishes, lettuce, and carrots.

Þ Early in the month you should buy your new bulbs and refrigerate them for six weeks before planting them in the garden.

  • October is also good time to consider reducing the size of your lawn. You can still rejuvenate a lawn with over-seeding.
  • Put your spent annuals 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 dig, divide, and re-plant overgrown perennials that have finished blooming. Be sure to clear out any weeds that developed in the perennial bed.
  • Check azaleas, gardenias and camellias for leaves yellowing between the veins. Apply chelated iron if this condition is present.
  • If you had glads, dahlias or tuberous begonias they should be dug up and cleaned after the foliage dies. Store the corms and tubers in a cool, dry place.
  • Be sure to deadhead your roses following the October bloom.
  • Keep your compost bin covered with a plastic tarp when rains begin.


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


Find us on Facebook



Event Name

Garden Advice and Workshops

Pumpkin Centerpiece workshop

November 9, 6-8pm

Market Street Grill, 415 Market St, Colusa

$25 per person

Wreath making workshop

December 3, 10am to noon

Place and fee to be determined



Featured Plant


California fescue


Medium size

California native




Master Gardener Blog

It's Bat Week! (October 24-31)

Mexican free-tailed bat in flight. [M.D.Tuttle]

Bat Week is an annual event to celebrate this small, flying mammal, and what better time to talk bats than at Halloween? Although they are often depicted as spooky, blood-sucking creatures, in reality, most bats eat insects and are helpful to...

Posted on Thursday, October 27, 2016 at 4:04 PM
Tags: bat (1), bats (8), Centers for Disease Control (2), management (7), pests (28), rabies (3)

Coming in on a Wing and a Prayer

A tattered monarch makes a refueling stop on a Tithonia in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

You've heard the expression, "On a wing and a prayer." It apparently originated during World War II. Remember the 1942 film,  "The Flying Tigers," starring John Wayne as Capt. Jim Gordon? John Wayne, aka Jim Gordon, asks a Rangoon hotel clerk...

Posted on Wednesday, October 26, 2016 at 5:35 PM

The Monarch and the Mantis

A gravid praying mantis, her abdomen bloated, grabs a migrating monarch nectaring on a butterfly bush. (Photo by Kathy Keatley Garvey)

If you're rearing monarchs or offering them a “way station” of nectar-producing flowers in your yard, there's one thing you don't want to see: A praying mantis nailing a monarch. That's when the "pollinator friendly garden" seems more like a...

Posted on Wednesday, October 26, 2016 at 5:00 PM
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