Trimming guidelines for popular hedging plants
Formal hedges
Evergreen
Buxus sempervirens (box): Twice or three times during growing season
Ilex aquifolium (holly): Once in late summer
Ligustrum (privet): Twice or three times during growing season
Lonicera nitida: Twice or three times in growing season
Prunus laurocerasus: Prune twice during growing season
Conifers
Chamaecyparis lawsoniana (Lawson cypress): Twice, in spring and summer
× Cuprocyparis leylandii (Leyland cypress): Twice or three times in growing season
Taxus baccata (yew): Twice, in summer and autumn
Thuja plicata: In spring and again in early autumn
Deciduous
Carpinus betulus (hornbeam): Once, in mid- to late summer
Crataegus monogyna (hawthorn): Twice, in summer and autumn
Fagus sylvatica (beech): Once, in late summer
Informal and flowering hedges
Evergreen
Berberis darwinii: Immediately after flowering
Cotoneaster lacteus: After fruiting
Escallonia: Immediately after flowering
Lavandula (lavender): Immediately after flowering
Pyracantha: Late summer
Deciduous
Berberis thunbergii: Immediately after flowering
Forsythia: After flowering, remove some older stems
Fuchsia magellanica: In spring, remove old stems
Rosa rugosa: In spring, remove thin twigs