Caring for Osmanthus

Once established, Osmanthus burkwoodii has moderate water needs and tolerates short dry spells, but it performs best with consistent moisture during prolonged dry weather in spring and summer. Water deeply every week or two if rainfall is scarce, particularly in the first two years. In autumn and winter, natural rainfall is usually sufficient. Avoid overwatering or allowing the roots to sit in saturated soil, especially on heavy clay. Feed in March or April as growth resumes. Apply a balanced slow-release shrub fertiliser (such as blood, fish and bone or a general-purpose granular feed) around the base at the rate recommended on the packet, then water in if the soil is dry. A second, lighter feed in late April can be beneficial on poor soils, but osmanthus is not a heavy feeder and will grow well without excessive fertilisation. Top up the mulch layer each spring to suppress weeds, conserve moisture, and gradually improve soil structure as it breaks down. This shrub is evergreen and fully hardy in zones 6a–8b, so it needs no special winter protection in temperate Europe. In very cold or exposed gardens, a temporary windbreak of hessian can prevent foliage scorch during harsh winters, but this is rarely necessary. Pests and diseases are uncommon. Occasionally you may see scale insects on the stems or undersides of leaves; treat with a horticultural soap or oil in late spring. Leaf spot can occur in very wet conditions but is seldom serious—remove and bin affected leaves and improve air circulation if needed.