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Nitrogen-fixing trees “eat” rocks, play pivotal role in forest health

By tapping nutrients from bedrock, red alder trees play a key role in healthy forest ecosystems.

Chris Branam | Feb 25, 2019 | News Story

Rhododendrons and azaleas need a strong acidic soil

Check out yellow leaves on rhododendrons and azaleas.

Jun 4, 2010 | News Story

Fruit tree site considerations

Climate, soil, water and chilling all effect which fruit trees will do best on your property. Here's what to consider.

Steve Renquist | May 2015 | Article

Trees and Shrubs for Erosion Control

A list of recommended trees and shrubs in Oregon, good for controlling erosion.

Jul 2018 | Collection

Managing Manganese Deficiency in Nursery Production of Red Maple

Discusses the processes of manganese (Mn) reaction in the soil, Mn movement in plants, Mn function in plants, results of studies of Mn in Oregon nursery fields, and management practices to prevent Mn deficiency in field-grown ...

Mar 2006 | OSU Extension Catalog

Fertilizing Shade and Ornamental Trees

Describes how to identify signs of nutrient deficiency in shade and ornamental trees. Discusses the most common soil nutrient deficiencies, types of fertilizer, and fertilization techniques. Offers a simple method, based on tree trunk diameter, for determining how much fertilizer to use.

Aug 2000 | OSU Extension Catalog

Plant native Oregon shrubs now

Time to plant native Oregon shrubs

Jan 29, 2010 | News Story

Give rhododendrons and azaleas an annual check-up each spring

Spring is time to care for rhodies.

Peg Herring | Mar 25, 2005 | News Story

Arborvitae root issues, should we dig it?

Q: We planted 17 emerald arborvitaes 3 weeks ago. We broke apart the rootball (at the suggestion of an employee at the retailer) and I've since learned that this is bad to do. We are watering regularly and have covered the ...

A: View answer | View all featured questions

Drought hits Douglas-fir trees hard

Diseases and pests take advantage of trees' weakened condition

Mary Stewart | May 29, 2015 | News Story