For 70 years, people have turned to one book to learn about Northwest trees. This edition expands its scope, covering even more species of trees — including several rare species native to southwest Oregon. It also updates scientific names and adds a new section on how Northwest forests are likely to be affected by changing climates.
We have a large walnut tree and would like to compost the leaves for our vegetable garden. I have read conflicting reports about the ability of composting to break down the toxin juglone. Is it safe to compost these leaves?
In this episode, Jacob Putney and Chal Landgren discuss the history and science behind growing Christmas trees in Oregon. Landgren is the former OSU Extension Christmas Tree Specialist.
Jacob Putney, Chal Landgren |
Dec 2022 |
Podcast episode
Learn how to protect trees from emerald ash borer in areas where the pest has become established in Oregon. This guide is for residential and professional landowners and land managers in urban and natural areas where the pest has been detected.
Alexander Gorman, Chris Hedstrom, Karen Ripley, Wyatt Williams, Christine Buhl, Scott Altenhoff, Chris Benemann, Jim Gersbach, Max Ragozzino, Cody Holthouse, Angie Ambourn |
Dec 2022 |
ArticlePeer reviewed (Gray level)
Getting sunlight into the canopy of a tree can help provide good light penetration and air circulation, assist ripening in fruit trees, and is pleasing to look at. Join our pruning pros for a demonstration on thinning the canopy of a mature crabapple tree.
How to remove a wayward branch that doesn't contribute to the structure and aesthetic of a tree. With Oregon State University Extension’s Nicole Sanchez and certified arborists John Bellon and Tom Ford.
We have an old growth juniper on our property, and it has been taken over by squirrels. They have made their homes underneath the tree. I am afraid they will weaken the root structure, and the tree could fall over in ...
I live inland from the coast about 10 miles at the boundary of the Siuslaw National Forest, and yesterday's heat (99 degrees here) did severe damage to the forest trees, my blueberry bushes, rhododendrons, and most all of ...
Brad Withrow-Robinson |
Jun 2021 |
Featured question
My beautiful cedars are now showing some dying branches. I’d like to send a photo to confirm if it has that fungus or beetle that’s killing lots of trees. And whether I need to cut them down before it gets dangerous to do so.
Extension curated and disseminated essential information about the devastating pest and assist with initial monitoring efforts to determine how far and fast the insect is spreading in Oregon.
Kara Baylog, OSU Extension forestry outreach coordinator in Jackson County worked with the Jackson Soil and Water Conservation District to contact landowners in the 2020 fire scar to offer free seedlings.
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.
Q: We have a large walnut tree and would like to compost the leaves for our vegetable garden. I have read conflicting reports about the ability of composting to break down the toxin juglone. Is it safe to compost these leaves?
