Skimmia in May: monthly care

Skimmia japonica thrives in partial or full shade, making it an excellent choice for those awkward north-facing borders or beneath the canopy of larger trees. Avoid sunny, exposed positions, as strong sunlight can scorch the evergreen foliage and cause yellowing. The ideal soil is moisture-retentive, humus-rich, and crucially, acidic to neutral; skimmia will not tolerate alkaline or chalky conditions. If your soil is heavy clay, dig in plenty of well-rotted compost or ericaceous compost to improve drainage and lower pH. For peat-based soils, simply ensure good structure by incorporating organic matter. Plant container-grown skimmia in March, April, May, September, or October, when the soil is workable and temperatures are mild. Dig a hole twice the width of the root ball but no deeper, so the top of the root ball sits level with the surrounding soil surface. Space plants about 96 cm apart to allow for their mature spread of up to 120 cm. If planting in groups, stagger them slightly for a more natural look and better air circulation. After planting, firm the soil gently around the roots to eliminate air pockets, then water thoroughly to settle the plant in. Apply a 5–7 cm layer of ericaceous mulch—such as composted bark or leaf mould—around the base, keeping it clear of the stem to prevent rot. This mulch conserves moisture, suppresses weeds, and gradually acidifies the soil as it breaks down. Water regularly during the first growing season to help the root system establish, especially during dry spells in spring and summer.

Skimmia japonica is a low-maintenance evergreen once established, but it does have specific needs. Water moderately throughout the growing season, ensuring the soil remains consistently moist but never waterlogged. During dry spells in spring and summer, water deeply once or twice a week. In autumn and winter, natural rainfall is usually sufficient, though container-grown specimens may need occasional watering in sheltered spots. Skimmia dislikes drought, and prolonged dryness will cause leaf drop and poor flowering. Feed in March and April using a slow-release ericaceous fertiliser, which provides the acidic conditions skimmia requires and supplies balanced nutrients for healthy foliage and flower bud development. Scatter the granules around the base according to the packet instructions and water in well. Alternatively, apply a liquid ericaceous feed every four weeks during the growing season. Avoid general-purpose or high-nitrogen fertilisers, which can lead to lush foliage at the expense of flowers. Refresh the mulch layer each spring with composted bark, leaf mould, or ericaceous compost to suppress weeds, retain moisture, and maintain soil acidity. Skimmia is fully hardy in zones 6b–9b and requires no special winter protection in temperate Europe, though a sheltered position will protect the foliage from harsh winds. Pests are rarely a problem, but vine weevil larvae can occasionally damage roots in container-grown plants; check for notched leaf edges and treat the compost with a biological control if needed. Skimmia is generally disease-free, though yellowing leaves (chlorosis) indicate alkaline soil or nutrient deficiency—remedy this with ericaceous feed and mulch.