Common Boxwood

Common boxwood is the evergreen hedge plant that has defined formal European gardens for centuries, and it remains one of the most widely planted broadleaf evergreens in Western Washington. You recognize it by the dense, fine-textured foliage, the ability to hold a clipped shape indefinitely, and the distinctive smell, musky, slightly acrid, that hits you when you brush against it or shear it on a warm day. Native to southern Europe, northern Africa, and western Asia, it grows slowly to fifteen or twenty feet unpruned, but most specimens in the region are maintained as hedges, topiaries, or foundation plantings well below that height.

Nine diseases and six pests are tracked on common boxwood in the knowledge base, and in recent years one has changed the conversation entirely: boxwood blight. This fungal disease arrived in the Pacific Northwest and can defoliate an established hedge within weeks under favorable conditions. Dark leaf spots, rapid leaf drop, and black streaking on stems are the diagnostic signs. There is no cure once established, the pathogen persists in fallen leaves and soil. If you are planting new boxwood, consider blight-resistant cultivars or switch to alternatives like Japanese holly or inkberry. If you have existing boxwood, maintain aggressive sanitation: sterilize tools, avoid overhead irrigation, remove fallen leaves, and scout regularly. Boxwood blight has not made common boxwood unplantable in Western Washington, but it has made ignorance about it unacceptable.