Ligustrum obtusifolium aka Border Privet

Ligustrum obtusifolium, or border privet, belongs to the olive family. Its native range includes eastern China, Korea and Japan. This shrub grows in temperate climates and has several stems. Most sources describe it as deciduous; UConn calls it semi-evergreen. Garden plants reach about 10–12 feet [3–3.7 metres] tall. RHS gives a broader range of 8–13 feet [2.5–4 metres]. The spread can match or exceed the height. Wide, horizontal branches give the plant a fine texture.

Thin stems have smooth bark in shades of grey and brown. Young twigs are grey-green and bear small, opposite buds. The deep green leaves also grow in opposite pairs. Each leaf is simple and oval, with a smooth edge. Leaves measure about one to two inches long. Their surfaces can have a slight sheen. In autumn, leaves may take on red or purple tones. Sources differ on how much this colour adds to the garden.

Small white flowers form narrow, hanging panicles in early summer. Both UConn and Missouri Botanical Garden give June as flowering time. The flowers have a scent that some find unpleasant. They attract butterflies and can provide a showy display. Round, blue-black fruits follow the flowers. These small drupes ripen in September and remain on the branches. The fruit also adds interest to the shrub.

Border privet grows in full sun or partial shade. It accepts clay, loam, sand and chalk soils. It also tolerates acid, neutral and alkaline soil conditions. Good drainage matters, since the roots do not tolerate waterlogging. Sources support both moist soil and tolerance of dry conditions. Missouri Botanical Garden lists USDA zones 3–7; UConn gives zone 4. RHS rates its UK hardiness as H5. Its broad form suits hedges, screens, borders and background planting. RHS advises clipping hedges twice during summer.

This plant can escape gardens and harm native habitats. UConn records an invasive tendency in Connecticut. Aphids, scale, leaf miners, thrips, mites and whiteflies may attack it. Diseases include leaf spot, powdery mildew, root rots and several wilts. PFAF records leaves as a tea substitute and roasted seeds as a coffee substitute. However, RHS warns that eating the plant can harm people and dogs. These reported uses do not establish that it is safe to eat. PFAF lists no known medicinal use.