Urban Forestry

Featured Resources

Invasive Weeds in Forestland: English Ivy

Sep 2008

Management options for English ivy in forest land: biological, chemical, and mechanical controls, plus grazing. Includes description of weed and its life cycle, history of infestation in the U.S. and West, and sources of more information.

OSU Extension Catalog

Invasive Weeds in Forestland: Himalayan & Evergreen Blackberry

Sep 2008

Management options for Himalayan and evergreen blackberry in forest land: preventive steps, biological, chemical, and mechanical controls, plus grazing. Includes description of weeds and their life cycle, history of infestation in the U.S. and West, and sources of more information.

OSU Extension Catalog

What's killed my tree?

Jun 2018

Are you one of the many woodland owners noticing continued signs of drought on your property? Drought impacts are complex; drought stressed trees become susceptible to insects and diseases that are naturally present (typically at low levels) in our woodlands. Take these four steps to help you identify what factors might be impacting your tree health.

By Norma Kline | Article

Latest Resources

Tree School Clackamas teaches love for the land

Apr 2019

Educational event draws hundreds from woodland community in Clackamas County and beyond.

By Glenn Ahrens, Rose Clarke, Michael Bondi, Kimberly Jacobsen Nelson | Article

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Latest News

Conifers naturally shed needles in summer and fall

Oct 7, 2016

You're not looking at the same needles over time

By Kym Pokorny | News Story

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Meet Our Experts

Signe Danler

Master Gardener Online Program Instructor

Contact for questions about Online Master Gardener and Home Horticulture program

Brooke Edmunds

Community Horticulture, Master Gardeners

Contact me with gardening questions from Linn or Benton counties

Dan Leavell

Assistant Professor of Practice

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.

Ask Us a Question

Can you identify this black and white bug?

Sep 2018

I have lived in Oregon all my life and never seen this kind of bug before, what is it? It's not very fast moving, this one wasn't anyway.

By Jean R. Natter | Featured Question

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