UCCE Master Gardeners of Orange County
University of California
UCCE Master Gardeners of Orange County

What's New on the MG Site?

Make this your year to grow vegetables!

Make this your year to grow vegetables!

If you're thinking of growing tomatoes this year, or if you want to try your hand at vegetable gardening, we have classes for you. 

Seed planting chart

Citrus Disease in Orange County

Citrus Disease in Orange County

HLB,  citrus greening disease, is now present in Orange County.  The still incurable disease is spread by the tiny insect, the Asian citrus psyllid.  


Beekeeping in Orange County

Interested in learning about Backyard Beekeeping in Orange County?

The UCCE Master Gardeners of Orange County are presenting a class with an introduction and overview on beekeeping. The class will be presented on 2 different dates.

Get More Information And Register Today.

Master Gardener Projects

Check out what Master Gardeners are doing in our community.  Our volunteers are can been at many venues and events throughout Orange County, California.  Check them out. Come visit us at one of the public venues?

8th Annual Urban Landscape & Garden Education Expo

Are you seeking solutions to conserving water in your landscape?

Please Join Us
Saturday, September 24, 2016 from 9:00 am to 2:00 pm

Fun for the whole family


Activities include:

-Visit with various gardening industry vendors and water agencies
-Presentations and demonstrations
-Taste exotic fruit grown at the South Coast Research and Extension Center
-Children's activities
-Food safety and preservation activities
-Free Tool sharpening
-Plant sale
and more...

South Coast Research and Extension Center, 7601 Irvine Blvd., Irvine, 92618
Free Admission and Parking

 Information on Speakers at the Event


Introducing Saturdays@SouthCoastREC, a new family-friendly adventure series for those interested in learning about gardening and food preservation.

Mark your calendars now! Our final event for 2016 will occur on November 5, 2016 from 9:00 AM - 11:00 AM at South Coast Research and Extension Center, 7601 Irvine Blvd, Irvine. We will highlight Gifts from the Garden and the Kitchen.

This is a free event with free parking.

Online registration in advance of the event is preferred, please visit this website to sign-up: Online Registration

More information



Did you know that along with bees -- butterflies, moths, beetles, birds, bats and even flies -- are pollinators.

Syrphid flies, also known as flower flies or hover flies, also eat aphids!

Read more about these syrphid flies, including photos of the larvae and adults.

New Pest in the Landscape causes Foamy Bark Canker

There is a new threat to our coast live oak trees.  A fungus associated with western oak bark beetle is causing the decline by spreading what is known as “foamy bark canker disease”.  This has been found in urban landscapes in Los Angeles, Orange, Riverside, Santa Barbara, Ventura and Monterey counties.

Find more information, including photos of trees with symptoms of the disease, at the Pests in the Urban Landscape blog and the Eskalen Lab website.


Save the Date! - Free Urban Landscape and Garden Expo

Save the Date for the annual UC ANR Urban Landscape and Garden Education Expo.

More information

South Coast Research and Extension Center

Plants appropriate for Southern California

There are plants specially suited to Southern California climates. Some are California natives that have been shown to do well in home gardens...

Natives in November

If the drought and warm weather has you frustrated with some of your typical garden plants and you are considering going with more native plants, you are in luck...

Urban Landscape and Garden Education Expo

University of California Division of Agriculture & Natural Resources  and Irvine Ranch Water District welcome you to the 6th annual Urban Landscape and Garden Education Expo. The event will be held Saturday, September 27, 2014 from 9:00 am to 2:00 pm.

Includes activities for the whole family.

Admission and parking are free.


Understanding Seeds - how to be successful when you plant seeds

Seed Buying 201 - Seed questions answered

Two new articles all about seeds for your garden from the Home Garden Seed Association


New Issue IPM News

The March 2014 issue of UC ANR IPM News is now available. This newsletter contains articles of interest to gardeners and up-to-date information on pest control.

Rose Pruning Handout

The 7th Annual Rose Pruning Workshop held on January 25th was a great success. The handout prepared by Annie Hall, the featured speaker, has been posted here...

Exotic fruit flies are a threat...

Exotic fruit flies such as Mediterranean fruit fly and oriental fruit fly are among the most serious threats to California’s $43 billion agricultural industry and to the home gardener as well.

Get ready for fall planting...

It's time to plan for the fall garden - tasty greens, healthy broccoli and cabbage, peas, beets, carrots, onions, asparagus, and more.

Fruit fly pest found in berries...

The Spotted Wing Drosophila attacks ripening fruit in many California counties. It infests raspberry, blackberry, blueberry, and strawberry crops, especially in coastal areas. It occasionally attacks other types of fruit with soft flesh, such as plums, plumcots, nectarines, and fig.

New pest of avocado, California Live Oak...

The Polyphagous Shot Hole Borer, a tiny beetle that drills into trees, has been found in Los Angeles and Orange Counties.  It brings with it a fungus (Fusarium sp.) that infects the trees.

It attacks a wide range of trees, including Avocado, California Live Oak, California Sycamore, Liquidambar, and others.

Summer vegetables

What vegetables to plant now.

Tips for growing, harvesting vegetables and controlling pests.

April garden tips, new information on fungi

April gardening tips from Yvonne Savio on veggies and edible flowers.

New information about boxwood blight.

Downy mildew on impatiens can cause defoliation!

Spiders and Bed Bugs

Brown Widow spiders have moved into Southern California. Learn about these relatives of the Black Widow spider...

Bed bugs can be a real problem. Learn about monitoring for their presence...


Some recent questions from the Master Gardener Hotline about avocados:

Fruit drop, blackened fruit, pruning...


Week ending June 16

Citrus Greening Disease, Bagrada Bug, basil and bee swarms...


Week ending May 19

Photos of avocado varieties; growing avocados in containers...

Week ending May 5

Help with bee swarms and information about bees...

Week ending March 17

All about Tomatoes...

Week ending December 3

Information on California-friendly plants...

Week ending November 12

Growing winter tomatoes, grubs in pots or soil, and more...

Week ending November 5

Storing vegetables, winter vegetable tips, and more...

Week ending October 29

More about avocados...

Week ending October 22

Avocados, citrus, soil and more..

Week ending October 15

New free gardening brochures...

Week ending October 8

Growing broccoli, edible plants for the fall garden, crop rotation and more...

Week ending October 1

All about cymbidium orchids...

Week ending September 24

Fall gardening tips, Stephanotis, ants in citrus, holiday cactus, camellias and more...

Week ending September 17

Invasive Plants, planting times for cool-season and warm-season grasses, beneficial insects, and a tomato pest...

Week ending September 10

New Autumn-Winter Hotline Brochure, planting times for cool-season and warm-season grasses, and more...

Week ending September 3

All about spinach, leafminers in vegetables, and skunks...

Week ending August 27

Palo Verde trees, citrus problems, avocado varieties, and more...

Week ending August 20

The summer garden, irrigation tips, strawberries and more...

Week Ending August 13

Tree selection, viburnum, squash and more...


Having trouble with caterpillars in your garden?

Blossom end rot

Are you seeing brown rot at the bottom of your tomatoes?


Are you having trouble with tomatoes this year?

Controlling Aphids

My plants are growing well but the new growth has aphids. What’s the best way to get rid of them?

Controlling Snails and Slugs

Snails and slugs seem to be everywhere in the garden...

Controlling Gophers

Hotline questions about gophers are starting to come in.  Gophers can be extremely frustrating!  Winter and early spring are the times to trap and control populations...

Planting Blueberries

I need help in starting to grow blueberries. 

Fertilizing Palo Verde trees

Do palo verde trees need fertilizer?

Controlling Ants

Last year, I had an ant problem.  What can I do to avoid the problem this year?

Weeds in Lawn

There are weeds sprouting in my lawn, and I’d like to identify them so I can use the right control methods to get rid of them. Can you help?

Pruning Fruit Trees

I have a few fruit trees in my yard, apples, peaches, oranges, and really need some advice on how to prune them. Can you help?

Planting Bamboo

I planted a bamboo hedge in my yard, and it’s really pretty, and I love it.  But now there are runners coming up in places where they shouldn’t. Is there any way to control this better – I don’t want to remove my beautiful bamboo.

How do I get a school garden at the school my child attends?

The Master Gardeners who are in charge of our School Garden projects and workshops tell the parents at their workshops to talk to the kids' teachers and...

Keeping Birds, Squirrels, and Opossums From Eating Blueberries

I just planted a blueberry bush which looks like it will be loaded with blueberries.  How do I keep birds and other fauna such as squirrels and opossums from eating the blueberries before I can get to them?

In The Community

Did you know the the Orange County Master Gardeners are active in the local community?

If you can’t find the answer on the site, don’t despair! We also have the capacity to personally assist you through our hotline.  Just contact us by email or by phone (voicemail) at 949 809-9760 and we will respond to your inquiry.
UCCE Master Gardeners of Orange County, California

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