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!



Pumpkin Centerpiece Workshop

Join the UC Master Gardener Program of Colusa County at our Pumpkin Centerpiece Workshop!

Thursday October 17, 6-8 pm.

100 Sunrise Blvd., Colusa, Ca

Learn how to decorate, carve and grow gourds. Appetizers will be provided.

Deadline to pay, Monday October 14. No tickets will be sold at the door.

$25 per person.

Click here to pay.

Pumpkin Centerpiece 19




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

UC IPM website


October in the Garden

What to plant:

  • Cool-weather annuals like pansies, violas, snapdragons can be transplanted now.  Also, you can direct seed cornflower, nasturtium, poppy, nigella, portulaca and sweet peas.
  • If you don’t have a winter garden, consider planting a cover crop to be tilled in next spring.
  • Direct seed peas, spinach, radishes, lettuce, and carrots.
  • 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



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
Countywide Craft Expo 11/2/2019
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