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Announcements

Emerald ash borer permanent quarantine for Washington, Yamhill, Marion and Clackamas counties

The invasive pest emerald ash borer has been found in Oregon and a permanent quarantine prohibiting the movement of tree materials was issued for four counties. Read more...
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Latest Resources

Boxwood blight in commercial nurseries

This title includes three products: a publication in English, a publication in Spanish, and a bilingual poster (both English and Spanish). This is the English edition of the publication. Content includes information ...

Luisa Santamaria | Apr 2025 | OSU Extension Catalog Peer reviewed (Orange level)

249 - How to buy a native plant

As nursery catalogs start to show up in our mailboxes and we think about the plants we want to grow next season, it's easy to get overwhelmed. In this episode, guest host Nicole Bell talks with Jen Hayes about two ...

Oct 2023 | Podcast episode

Integrated Pest Management Strategic Plan for Oregon Nurseries

Ornamental nurseries face many pest management challenges, from weeds to insects to disease. In this report, industry representatives prioritize those challenges in an effort to increase the use of integrated pest ...

Chris Hedstrom, Isaac Sandlin | Jul 2022 | OSU Extension Catalog Peer reviewed (Orange level)

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Preventing Phytophthora Infestations in Restoration Nurseries

By Norma Kline ​​​​​​Marianne Elliott Jennifer Parke Dan Stark David C. Shaw ​​​​​​​and Alicia Christiansen

Phytophthora species are water molds that can kill plants. They can spread undetected in container plants and equipment. Once they are introduced to an ecosystem, it's difficult or impossible to eradicate them. Nurseries can help prevent the spread of Phytophthora by following some simple steps.

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Latest News

OSU research vital for Oregon's nursery industry success

Researchers in the OSU Agricultural Experiment Station and OSU Extension Service provide a wealth of resources, including publications and expert advice, to help nursery and greenhouse operators stay informed about best practices and new developments in the industry.

Lloyd Nackley, Shawn Donkin, Sam Angima | Jan 2025 | Impact story

OSU research enhances efforts to make olive farming viable in Oregon

The goal is to grow as many olive cultivars as possible in a field evaluation and to select cultivars best adapted to the region.

Heather Stoven, Neil Bell | Jan 2025 | Impact story

Most valuable Oregon agricultural commodity benefits from OSU plant trials

Development of genuinely low-input landscapes for Western Oregon will require use of drought-tolerant, evergreen ground covers, few of which are currently used in local landscapes because data on their adaptability to local conditions are not available.

Heather Stoven, Neil Bell | Jan 2025 | Impact story

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Meet Our Experts

Marcelo Moretti
Associate Professor

Contact me with questions about weed management in commercial agriculture.

A middle-aged man smiles warmly, wearing a dark shirt. He has a short, neatly trimmed brown beard with touches of gray at the center, a short haircut, and a receding hairline. Behind him is a serene forest of tall pine trees.
Lloyd Nackley
Nursery Researcher

Contact about commercial greenhouse management and nursery production

Jay W. Pscheidt
Professor and Statewide Extension Plant Pathology Specialist
Luisa Santamaria
Nursery Pathology Specialist, Bilingual Educator
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Ask Extension 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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Flavorless saffron?

Q: We just finished harvesting our first good crop of saffron crocus from our yard. We often get many plants but only a few flowers. This year, we got about 50 blooms over a few weeks. After drying for a few days, we ...

A: View answer | View all featured questions

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