← All guides · Species · Updated October 2026

Box blight and box tree moth: what to plant instead at St Margaret's.

Box hedging has taken a double blow across southeast England. Box blight, a fungal disease caused by Cylindrocladium buxicola, has been spreading through UK gardens since the early 2000s, and the box tree caterpillar (Cydalima perspectalis) arrived from continental Europe, with the first moth recorded in Britain in 2007 and garden caterpillars from 2011. In St Margaret's and across the Dover coast, October is the practical moment to assess whether a struggling box hedge is worth further treatment or whether to remove it and replant with something better suited to both the problem and the place.

The two problems: blight and caterpillar

Box blight and the box tree caterpillar are different problems with different signatures. Getting the diagnosis right matters, because the treatment options and the decision about whether to replace are different for each.

Box blight presents as brown patches on the foliage, sometimes with white fungal growth on the undersides of affected leaves in humid conditions, followed by bare stems as the dead growth drops. It spreads fastest in warm, damp weather, and on the Channel coast that means late summer and early autumn are high-risk seasons: the sea fog that rolls in off the Strait of Dover in September and October can keep foliage wet for extended periods, which is ideal for the spores. The pathogen is also carried on contaminated tools and clothing, so a hedge that looked clean before a contractor visited can develop blight if the contractor has been working on infected plants elsewhere without cleaning between jobs.

Box tree caterpillar damage looks quite different. The caterpillar, the larval stage of the box tree moth, strips foliage and leaves fine webbing and pellet-shaped frass inside the hedge structure. A heavily infested hedge can look as though it has been scorched: rapid interior browning with webbing visible once you part the stems. The moth has at least two generations a year, with most feeding damage between March and October, so it can cause significant damage between inspections.

Rosy Hardy of Hardy's Cottage Garden Plants covers both problems and a range of alternatives in her video Alternative Shrubs to Box Hedge If You Struggle with Box Blight and Box Tree Moths (Rosy Hardy Gardening, YouTube).

Treating or replacing?

For a young hedge that is only partially affected, treatment has a reasonable chance. Box blight is best managed by good hygiene: improved air circulation, clipping only in dry weather, and removing all fallen dead material from around the base of the hedge. The RHS recommends against relying on fungicides, which are unlikely to work unless combined with those other measures, so check its current guidance if you are considering one. Box tree caterpillar can be monitored with pheromone traps from May onwards, and the RHS lists nematode-based biological controls, so check its current advice before buying.

For an established hedge that has lost more than half its foliage, or that has had blight for three or more consecutive seasons without recovery, the honest assessment is that the cost of ongoing treatment rarely justifies continuing. October is a practical moment to make that decision: the growing season is winding down, the nesting season closed at the end of August, and bare-root replacement stock becomes available from nurseries from late October through to late February.

Alternatives graded by exposure

The species below have been selected against the specific conditions of the Dover coast: the chalk-based, freely draining soils that run from Ringwould through St Margaret's at Cliffe to South Foreland, the salt-laden Channel air, and the combination of winter gales and dry summers that this stretch of coastline produces.

Clifftop and Bay (most exposed)

At the most exposed positions, salt-wind tolerance is the starting point. Box was never reliable here; the alternatives that genuinely work include the following.

Euonymus japonicus and its compact cultivars: this species has become one of the most widely recommended box alternatives for coastal gardens in the UK. Compact cultivars, including 'Jean Hugues', produce small, dark, glossy leaves and a dense growth habit that clips cleanly to a formal edge. It is commonly listed as tolerant of coastal winds and alkaline soils, which suits the chalk-alkaline conditions throughout the CT14 and CT15 area, though the RHS notes it can suffer dieback in cold winds, so give it some shelter on the most exposed ground. It holds its shape with one or two clips per year, broadly the same maintenance load as box. Full guide: Euonymus japonicus hedging on the Dover coast.

Low-clipped yew (Taxus baccata): the slowest-growing of the chalk-tolerant alternatives and the most formal. Yew is naturally adapted to the chalk downland conditions of the Dover coast, thriving in the free-draining limestone soils from Ringwould to St Margaret's Bay. It will hold a hard-clipped edge indefinitely and is one of the few conifers that regenerates readily from old wood if a section is damaged by a hard winter or salt scorch. Growth at a fully exposed clifftop position is slow, which is an advantage rather than a problem for a low formal hedge.

Lonicera nitida: a fast-growing alternative with small, glossy, deep green leaves that gives a reasonably formal appearance at low hedge heights. It tolerates chalk and clips readily but needs more frequent trimming than most alternatives to stay crisp, typically two to three cuts a year. On fully exposed clifftop sites it benefits from a temporary windbreak shelter for the first growing season while it establishes. Full guide: Lonicera nitida hedging on the Dover coast.

Village and inland (moderate exposure)

In the more sheltered village gardens around St Margaret's at Cliffe, Kingsdown and Walmer, the same three species above apply and two further options become reliably viable.

Lonicera nitida 'Maigrun' is the most upright and formal-looking of the lonicera nitida selections and is particularly suitable for a crisp low hedge where box once grew.

Pittosporum tobira 'Nanum': a compact dwarf pittosporum with dense, dark evergreen foliage. Slower-growing than lonicera and useful for borders and low formal hedges. It needs good drainage, which chalk provides naturally, and dislikes waterlogging. It is not recommended for fully exposed clifftop positions in a hard winter, but it performs reliably in sheltered village gardens on the Dover coast.

Viburnum tinus: not a box lookalike but worth naming here because it solves the problem from a different angle. At village and moderate exposure, Viburnum tinus makes a dense, informal-to-semi-formal screen of 1.5 to 2 metres and flowers November to April when box would have been an inert green block. If you want a hedging plant that is hard to kill, chalk-soil tolerant, genuinely wildlife-useful and gives a visual return through the winter, it deserves serious consideration as part of the replacement plan. Full guide: Viburnum tinus hedging on the Dover coast.

Choisya ternata (Mexican orange blossom): worth considering for village and sheltered positions as an informal screen to around 2 metres. Its shiny, waxy leaves handle moderate salt spray better than soft-leaved evergreens, chalk soil suits it, and the double flowering season (May and again in autumn) makes it more visually rewarding than a plain evergreen screen. It cannot handle full clifftop exposure reliably, but as a box replacement in a village garden with some windbreak shelter it is a practical and ornamental choice. For the full exposure-graded guide, see our Choisya hedging on the Dover coast.

Dover town and sheltered (least exposed)

In fully sheltered positions in the CT16 and CT17 area, the full range above applies, plus two further options worth considering.

Buxus microphylla 'Faulkner': if you are still committed to keeping box, the cultivars of Buxus microphylla, including 'Faulkner', are less susceptible to box blight than common box (Buxus sempervirens), according to Belgian work cited by the RHS, though none is immune. They are slower-growing, producing a lower-maintenance formal edge, and they remain a viable choice in sheltered positions where blight pressure is manageable. They are still susceptible to the box tree caterpillar, so monitoring continues to apply.

Osmanthus x burkwoodii: not a direct visual match for box, but a formal slow-growing evergreen with no box-specific pest risk and genuine chalk-soil tolerance. It produces intensely fragrant white flowers in April, which no box equivalent offers. For a full exposure-graded guide, see our Osmanthus x burkwoodii hedging guide.

Ilex crenata (Japanese holly): nationally the most frequently recommended box substitute, with leaves and a clipped texture that comes closest to common box. One caution specific to the Dover coast: Ilex crenata prefers neutral to slightly acid soils and can develop chlorosis (yellowing) on the free-draining, chalk-alkaline soils that are common from Ringwould to St Margaret's Bay. In the heavier, less chalk-dominated soils of Dover town gardens, it is a reliable choice. On chalk-rich ground further up the coast, Euonymus japonicus is a safer selection for the same visual effect. The chalk-pH consideration is the same issue we describe in more detail in our chalk-soil hedge establishment guide.

Removing old box and timing the replant

October is a practical window for removing a failed box hedge: the growing season is over, the ground is still workable, and bare-root planting stock arrives at nurseries from late October onward, which is the optimum planting period for most of the alternatives above. For complete removal, cut the existing hedge back hard, remove the root mass, and allow the ground to settle before planting. Box pathogens can persist in soil, so work in plenty of fresh compost and avoid replanting box straight back into the same ground.

Under the Wildlife and Countryside Act 1981, section 1, it is a criminal offence to damage or destroy an active wild bird's nest. Box hedges, even unhealthy and partially defoliated ones, are used as nesting sites by sparrows, wrens and dunnocks. Before removing any hedge, check the structure for active nests. The main nesting period runs from 1 March to 31 August, and October removal is well outside that window, but a mild autumn can occasionally extend nesting activity. For a full breakdown of how the nesting season law fits around the coastal cutting calendar, see our hedge cutting timing guide.

Replanting aftercare on chalk

Whichever species you choose, the aftercare on the chalk soils from Walmer to St Margaret's Bay follows the same principles: plant into well-prepared ground with a generous organic matter incorporation, water through the first dry spell of the following spring and summer (chalk drains rapidly and dry chalk slopes dry out faster than most gardeners expect), and protect clifftop plantings with a temporary wind-break barrier for the first winter. The establishment approach for new hedging on chalk is covered in full in our autumn bare-root hedge planting guide, and applies equally to these box alternatives as to any other new hedging.

On the most exposed clifftop sites between South Foreland and St Margaret's Bay, Euonymus japonicus and low yew are the two species we would recommend first, not because the others are wrong but because these two have the strongest track record in Dover coast conditions specifically, and their low maintenance requirements suit a garden where the exposure already creates enough work without a high-maintenance hedge adding to it.

Sources: Rosy Hardy Gardening, "Alternative Shrubs to Box Hedge If You Struggle with Box Blight and Box Tree Moths" (YouTube, youtube.com/watch?v=aUtK9gsaVWo, channel: youtube.com/@RosyHardyGardening; Rosy Hardy of Hardy's Cottage Garden Plants, Freefolk, Hampshire); Hopes Grove Nurseries, "Box Hedge Alternatives" (hopesgrovenurseries.co.uk/blog/box-hedge-alternatives/) and "Hedges for Coastal Gardens" (hopesgrovenurseries.co.uk/blog/hedges-for-coastal-gardens/); RHS, "Box Alternatives for Healthy Hedges" (rhs.org.uk/plants/types/shrubs/box-alternatives-how-to-choose); RHS, Box blight (rhs.org.uk/disease/box-blight); RHS, Box tree caterpillar (rhs.org.uk/biodiversity/box-tree-caterpillar); Wildlife and Countryside Act 1981, section 1 (nesting offence, 1 March to 31 August).