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Flowers, shrubs and trees

Photo Credit: Alyson Yates (Cropped from original)

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Featured Resources

Roses: Planting and Care in Central Oregon

Are you longing to enjoy the fragrance and color of roses in your yard? With thoughtful attention to planting and care, many types of roses can be grown successfully in Central Oregon.

Amy Jo Detweiler | Apr 2023 | Extension Catalog publication

Five tips for properly planting a conifer tree

When it comes to planting conifers, timing is everything.

Kym Pokorny | Feb 17, 2023 | News story

Become a Master Gardener!

The Master Gardener™ program educates Oregonians about the art and science of growing and caring for plants. This program also facilitates the training of a highly educated group of volunteers, who extend sustainable gardening information to their communities through education and outreach programs.

Learn more

Latest Resources

Is this trillium a rare variant and should it be preserved and studied?

On a run in Portland’s Forest Park, I saw that someone had picked a trillium and hung it on a branch. When I looked closer, I could understand why. It has two sets of three leaves, and nine petals. What do I do with this?

James Mickley | Apr 2024 | Featured question

High Desert Garden Tour (in English)

Come and explore several gardens at this self-guided event. The High Desert Garden Tour is July 20, 2024 in Powell Butte area featuring several sites. Click here for more information.

Mar 2024 | Educational document

Dahlias in Oregon: Planting for a Parade of Late-season Blooms

Learn how to adapt dahlia cultivation to the variety of unique growing conditions found in Oregon.

Carla Stables, Julie Moore, Evie Smith | Feb 2024 | Extension Catalog publication

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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!

Watch Video
Photo Credit: Alyson Yates (Cropped from original)

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 (in English)

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

This collection lists trees and shrubs in Oregon, organized by showy flowers, fruit and fall colors. This is a great resource for designing a garden or landscape.

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Photo Credit: Onebit - Adobe Stock (Cropped from original)

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...

Ed Jensen | May 2022 | Extension Catalog publication

141 - Neil Bell - The best pollinator shrubs and trees (in English)

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 with the Pros - Is this tree worth saving? (in English)

What a “volunteer” tree is in a landscape, its merits, and how it can be salvaged for a more attractive profile. With Oregon State University Extension’s Nicole Sanchez and certified arborists John Bellon and Tom Ford.

Feb 2022 | Video

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Latest News

Colorful indoor plants make delightful gifts for the holidays

The choices go beyond traditional poinsettias and amaryllis. Colorful African violets, gloxinia, cyclamen, orchids, ornamental peppers and Christmas cactus are blooming and readily available.

Kym Pokorny | Nov 17, 2023 | News story

The debate over native plants and their cultivars gathers steam

Research about native plans and their cultivars that has been done – primarily on the East Coast – hasn’t been conclusive.

Kym Pokorny | Nov 3, 2023 | News story

OSU Extension research group searches for plants to weather climate change

The plants in the field trials were chosen by an advisory group of nursery growers and landscape designers and were evaluated on growth, visual appeal, timing of flowering, density of flowers, physiology and heat tolerance.

Kym Pokorny | Nov 1, 2023 | News story

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Upcoming Events

May 10

Let's Talk Plants (PCMGA Plant Sale)

9:00 am - 3:00 pm Rickreall, OR
May 11

Growing Irises 101

9:30 am - 11:00 am Glide, OR
May 15

Agricultural Learning Center Tour & BBQ

4:00 pm - 6:00 pm Roseburg, OR
May 18

Conifers of the PNW: Characteristics and natural history of conifers in the pine family

10:00 am - 12:00 pm Portland, OR
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Meet Our Experts

Signe Danler
Signe Danler
Home Horticulture Online Program Instructor

Contact for questions about Home Horticulture online. Submit other questions to Ask Extension, link below.

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

Contact me about the Master Gardener Program or gardening questions from Marion or Polk counties

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Is this trillium a rare variant and should it be preserved and studied?

P: On a run in Portland’s Forest Park, I saw that someone had picked a trillium and hung it on a branch. When I looked closer, I could understand why. It has two sets of three leaves, and nine petals. What do I do with this?

R: View answer | View all featured questions

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