Box Wood discolor
Hi, The outside or last 1 inch growth of my boxwood plants started turning a dull yellow late last summer. The growth further down inside the plant is a normal green. I believe the plants received plenty of water. Is this a nutrient problem? The short term fix would be to trim off the outside growth but it would probably not solve the long-term problem. Thanks, Craig
Thank you for your question, Craig. There are several potential problems experienced by boxwoods, as discussed in this Extension article: https://extension.umd.edu/hgic/topics/boxwood-culture-and-diseases-including-boxwood-blight Although from Maryland, the boxwood blight has been found here in Oregon. However, without being able to examine the plant, a definitive diagnosis is impossible. Are you able to take some samples—yellowing, healthy, inside and outside—into the Clackamas Co. Extension office? It is staffed work days 9-noon and 1-4. Master Gardeners are there to assist. Good luck!
Great, Craig! Since the Master Gardeners leave at 4, you might want to get there by 2:00 or so. (You never know how many other issues they might be handling.) If they cannot diagnose it, OSU has a Plant Clinic in Corvallis, whose advice might be sought. Happy that Kimberly is involved!