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Flowers, Shrubs, and Trees

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Announcements

Emerald ash borer detected in Oregon: Be alert and report sightings

The invasive pest emerald ash borer has been confirmed in Forest Grove. Learn how to identify it, report sightings, and share this important information with others. Read more...
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Latest News

Get ready, get set for summer weather with these tips from OSU Extension

Take a lesson from the 2021 historic heat dome and be prepared to help plants through hot and dry weather as the season progresses.

Jun 24, 2022 | News story

Give overgrown trees a makeover with new OSU pruning video series

Knowledge is everything when it comes to pruning mature trees.

Feb 18, 2022 | News story

OSU Extension Master Gardeners see big success with free Level Up Series

The webinars are free and geared toward experienced gardeners but with plenty of information for beginners, too.

Kym Pokorny | Jan 26, 2022 | News story

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Featured Resources

Sign up for local Community Gardens and Visit Local Gardens

OSU Master Gardener volunteers manage three gardens during the growing season. The OSU Demonstration Garden located in Redmond, Hollinshead Community Garden and Discovery Park Community Garden, both located in Bend. Read more here...

Mar 2022 | Fact Sheet

How to care for heat-damaged plants

Go ahead and cut off dead flowers on heat-burned plants, but try to resist the urge to remove partially dead leaves.

Kym Pokorny | Jul 9, 2021 | News story

Heat wave in the garden: How to identify and prevent heat stress in plants

When a heatwave hits, plants may show the impact. Learn the signs of heat stress in plants and how to help them weather a heatwave with best practices for watering, mulching, shading, providing humidity and weeding.

Nicole Sanchez | Jun 2021 | Article Peer reviewed (Gray level)

WaterWise Gardening

Information on gardening techniques and recommended plants for water conservation and general watershed health.

Jul 2018 | Collection

Buzzing and Beautiful: Designing Pollinator Gardens with OSU Extension

By Signe Danler, Andony Melathopoulos, Neil Bell, Amy Jo Detweiler, Nicole Sanchez and Heather Stoven

A recording of a webinar touring through two new OSU guides to help you garden for pollinators and then ask questions of all the authors. We covered everything from what shrubs to plant, how to use mason bees and more!

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Flower Resources

Fight ‘big four’ rose problems with prevention strategies

There are steps you can take to control black spot, rust, downy mildew and powdery mildew.

Kym Pokorny | Mar 2, 2020 | News story

When planning next year’s garden, turn to popular native plants

If sited correctly, native plants can perform well and attract pollinators.

Kym Pokorny | Jan 3, 2020 | News story

167 - Linda Hardison - Oregon Flora… reloaded

Linda Hardison is the director of the Oregon Flora and a research assistant professor in the Botany & Plant Pathology Dept. at Oregon State University. She grew up in Texas, and received undergraduate degrees in botany and ...

Andony Melathopoulos | Jan 2021 | Podcast episode

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Trees and Shrubs by: Showy Flowers, Fruit and Foliage

A list of recommended trees and shrubs in Oregon, organized by showy flowers, fruit and fall colors.

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Tree and Shrub Resources

Shrubs to Know in Pacific Northwest Forests

This full-color, simple-to-use field guide makes shrub identification easy and fun. It features complete descriptions of the most common shrubs that grow in and around Pacific Northwest forests —from southern British Columbia to ...

May 2022 | OSU Extension Catalog Peer reviewed (Orange level)

141 - Neil Bell - The best pollinator shrubs and trees

Neil Bell oversees the Master Gardener program in Marion County and Polk County and works with my volunteers to assist homeowners with their garden problems. His research interests involve evaluating evergreen shrubs for un-irrigated...

Andony Melathopoulos | Jun 2020 | Podcast episode

Pruning Trees and Shrubs

This is a brief fact sheet providing information on how to properly prune trees and shrubs.

May 2018 | Fact Sheet

Tree Selection

This fact-sheet provides information about tree selection for anyone looking to purchase a tree.

May 2018 | Fact Sheet

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Latest Resources

Emerald Ash Borer resources

Learn how to identify the emerald ash borer beetle and ash trees, what you can do and ways Oregonians are planning for and preventing the spread of this destructive insect.

Aug 2022 | Collection

How can I support the endangered Monarch butterfly?

I recently read in the news that the Monarch Butterfly was added to the endangered species list. What can I plant in my garden to help the butterfly? I read that milkweed plants are their natural habitat. Yesterday I ...

Kristena LaMar | Aug 2022 | Featured question

Emerald Ash Borer Readiness and Response Plan for Oregon

The Oregon Department of Forestry and Oregon Department of Agriculture outline important steps, highlight tools and resources already available, and guide the state’s approach to handling an emerald ash borer (EAB) infestation at all stages.

Mar 2021 | Online resource

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Upcoming Events

Aug 13

WCMGA Learning Garden, Open Garden – Grow Together: Families in the Garden

10:00 am - 2:00 pm Beaverton, OR
Aug 20

Hollinshead Community Garden Open Garden Day

9:00 am - 1:00 pm Bend, OR
Sep 8

Success with Pacific Northwest Native Plants workshop *

10:00 am - 12:00 pm Beaverton, OR
Sep 10

Low Maintenance Gardening

10:00 am - 12:00 pm PDT Online
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Meet Our Experts

Signe Danler
Signe Danler
Master Gardener Online Program Instructor

Contact for questions about Online Master Gardener and Home Horticulture program

Amy Jo Detweiler
Amy Jo Detweiler
Horticulture
headshot of Brooke Edmunds
Brooke Edmunds
Community Horticulture, Master Gardeners

Contact me with gardening questions from Marion or Polk counties

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Have a question? Ask an Expert!

Ask an Expert is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.

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How can I support the endangered Monarch butterfly?

Q: I recently read in the news that the Monarch Butterfly was added to the endangered species list. What can I plant in my garden to help the butterfly? I read that milkweed plants are their natural habitat. Yesterday I ...

A: View answer | View all featured questions

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