The plant sales are here and gardeners are revving up. You may have some questions. For answers, turn to Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU Extension faculty and Master Gardeners reply to queries within two business days, usually less. To ask a question, simply go to the OSU Extension website , type it in, and include the county where you live. Here are some questions asked by other gardeners. What’s yours?