You can ask your question online using Ask the Expert.
To receive the best possible answer to your gardening question, please provide as much information as possible. This includes bringing a sample of the plant (or insect, spider, etc.) with which you have a question or concern into your local OSU Extension office. If it is not practical for you to bring a sample into the Extension office, please provide a photograph of that captures the plant or section or your yard with which you have a question or concern. A wide angle photograph and a close up are helpful, in many instances. Finally, please allow the Master Gardener volunteers the time that they need to comprehensively research your question.
OSU also has several publications, of specific interest to home gardeners, available online on the OSU Extension Publication Catalog.