boxwood psyllid, boxwood leaf minor, boxwood mite , nematodes and phytophthora root rot can be problems as well as other insects and diseases foliar burn in exposed sites or during harsh winters foliage produces a distinct fragrance some dislike General Information Scientific name: Buxus sempervirens Pronunciation: BUCK-sus sem-pur-VYE-renz Common name(s): common boxwood, common box, American boxwood Family: Buxaceae Plant type: shrub USDA hardiness zones: 6 through 8 (Fig. All photos by Rebecca Finneran, MSU Extension. The boxwood is one of the most popular ornamental shrubs thanks to its cutting tolerance. Through the years, the boxwood has been associated with formal gardens. Protect shrubs from drought and drying winds in the autumn and winter. In some areas of Michigan, yearly feeding of this insect can seriously disfigure the shrubs, as damaged leaves are shed mid-summer. If you live in a place that experiences freezing temperatures in the winter, your boxwood may have been damaged by excessive snow, ice and cold – or even winter burn. Facts on the Boxwood Shrub. koreana, aka Korean boxwood, is a littleleaf variety that is suited to Zones 4-9, making it a good option for northern growers. 2) Boxwood leafminer larvae feed on boxwood leaves, making obvious "blisters" on the leaf. Water stress and low temperature. Leaf spot: Straw-yellow leaves are dotted with small, black fungal fruiting structures. japonica), hardy in USDA zones 6 through 9. Brown or Yellowing Boxwood Shrubs. Here are some common causes of a boxwood turning yellow or brown: Winter Damage. Here we explain the most common problems and what you can do about it. Leaf burn: Leaf tips and margins yellow and redden as leaves fall prematurely. the leaf axils and are barely noticeable to the eye, but they have a distinctive aroma that irritates some people. English boxwood's most common enemy is the boxwood psyllid, although all in the Buxus genus can be susceptible to this plant sap sucker. Unfortunately, it is increasingly causing him pests and diseases. Cultivars / Varieties: 'Arborescens' Lustrous dark green leaves 'Aureovariegata' Variegated leaves 'Elegantissima' White leaf margins 'Fastigiata' 'Suffruticosa' Dense, compact, slow growing, leaves fragrant, considered to be least tolerant to box leaf miners. Colonial Williamsburg, especially around the Governor's Mansion, offers wonderful examples of formal boxwood use. Winter burn, or bronzing, commonly afflicts littleleaf and Japanese boxwoods (Buxus microphylla, Buxus microphylla var. Boxwood leafminer can be a serious pest of a favorite landscape plant, boxwood. Boxwood (Buxus) shrubs are a common sight in home gardens and commercial landscaping projects all over the world. Boxwood parterres and hedges can be seen in many of the great gardens of Europe and America. Boxwood leaves turns orange for two reasons, one seasonal and one disease-related, but the disturbing switch is limited to a handful of varieties. Macrophoma candollei: Only leaves weakened by winter injury are infected. B. microphylla var. Gardeners use … Boxwood leafminer (Monarthropalpusi flavus) is a common and destructive pest that causes significant damage to boxwoods here in the Dayton area, although the symptoms are often mistaken for winter injury rather than insect infestation.Since boxwoods are such a popular shrub, it’s important to control leafminers so they don’t spread to neighboring plants and properties. With a smaller overall stature as well as smaller leaves than the common species, you’ll see a few variants of this type, and breeders may choose to write these on plant labels in a variety of ways. Winter Burn The Problem. The autumn and winter parterres and hedges can be a serious pest of a boxwood turning yellow or brown winter... 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