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Flowers, Shrubs, and Trees

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How to identify and care for False Shamrock?

Q: I'm taking the Gardening Certification course and I cannot quite understand how to identify the variety of a False Shamrock. Can you help me out? I also purchased one and would like to know how to care for it. Thank you!

A: View answer | View all featured questions

Shrubs and Trees for Bees

Habitat loss is a factor in the decline of native bees. Planting key plants in yards and gardens may be one way to improve habitat and help these species recover. Learn how to increase the number and diversity of flowering plants that support bees with a look at this list of native trees and shrubs.

Sandy DeBano, Andony Melathopoulos | Mar 2023 | OSU Extension Catalog Peer reviewed (Orange level)

EEAC Keynote: Gentle Pressure Relentlessly Applied for Diversity in Oregon's Master Gardener Program

Dr. Gail Langellotto shares her journey from entomologist to Extension Master Gardener Program coordinator in Oregon, discussing her commitment to making the program accessible to all gardeners through focusing on meaningful actions ...

Jan 2023 | Video

Pruning mature fruit trees?

Q: We have two very old fruit trees: an apple tree that is over 40 years old that needs thinning and a mature cherry tree that has lost several limbs. The apple tree has overproduced with several 30-gallon garbage cans of ...

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2023 Pest Management Guide for Tree Fruits: Hood River, The Dalles, White Salmon, Rogue Valley, Umatilla County

This guide provides tree fruit growers with the latest information on pesticides and herbicides for fruit trees. People who grow apples, pears and cherries can learn application rates and recommendations for each stage of tree growth.

Ashley Thompson, Rick Hilton, Achala KC, Marcelo Moretti, Jay W. Pscheidt, Nik Wiman, Christopher Adams, Andony Melathopoulos, Cody Copp | Jan 2023 | OSU Extension Catalog Peer reviewed (Orange level)

Walnut leaves: Safe for composting?

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?

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What to do about emerald ash borer: Recommendations for tree protection in EAB-infested areas

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 | Article Peer reviewed (Gray level)

How can I protect my flowers from freezing?

Q: My husband and I planted flowers this past summer. Our hydrangeas have done really well and have still been blooming. We have temps dropping below freezing this coming week. How should I care for them? I’m also new to ...

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Gardening with Oregon Native Plants West of the Cascades

Growing a garden in western Oregon is easier when you include native plants. That’s because native plants are adapted to our wet winters and dry summers. Native plants also provide benefits to native pollinators and other ...

Linda R. McMahan, Heather Stoven | Oct 2022 | OSU Extension Catalog Peer reviewed (Orange level)

OSU study of native plants and pollinators presented at the largest nursery industry show in the West

Four Extension faculty and one research assistant gave presentations at the Farwest Show, which annually draws an estimated 5,000 attendees to the Oregon Convention Center and nursery tours.

Kym Pokorny | Sep 2, 2022 | News story