Many annuals, bulbs, herbaceous perennials and shrubs are affected. The following plants are a sample of many that are cultivated for their bicoloured flowers:
Impatiens F1 hybrid ‘Tutu Red Bicolor’: early flowering bright-red double and semi-double flowers highlighted with patches of snowy-white. Seed raised and bred for bicoloured flowers.
Pelargonium ‘First Blush’: regal pelargonium with white flowers each with a spreading blaze of red across the upper petals.
P. ‘Rouletta’: ivy-leaved pelargonium with semi-double, bicoloured light crimson flowers in clusters. Height 60cm (2ft).
Camellia japonica ‘Lavinia Maggi’ AGM: formal double white flowers with red and pink stripes, in early spring.
Cytisus ‘Zeelandia’: with creamy-white and lilac-pink in clusters, late spring and early summer. Height 1.5m (5ft).
Dahlia ‘Twynings Smartie’ AGM: single flowers have cerise and white petals.
Lupinus ‘The Chatelaine’: racemes of bicoloured pink and white flowers in early and mid-summer. Height 90cm (3ft).
Phlox maculata ‘Natascha’: an early phlox cultivar with white petals striped magenta. Height 90cm (3ft).
Rosa gallica var. officinalis ‘Versicolor’: very fragrant pale-pink flowers are striped reddish-pink. Height 80cm (32in).
R. ‘Ferdinand Pichard’: fragrant pale pink blooms with pink and red stripes produced from summer to autumn. Height 1.5m (5ft).
Salvia microphylla ‘Hot Lips’: shrubby aromatic evergreen with bicoloured red and white flowers from summer to autumn. Height 90cm-1.2m (3-4ft).
Tulipa ‘Estella Rijnveld’: a Parrot Group tulip producing fringed white-flamed red flowers in late spring. Height 55cm (20in).
Recently introduced shrubs:
Buddleja ‘Bicolour’: with pink and orange flowers in panicles, during summer.
Mahonia ‘Cabaret’: with yellow and orange flowers in panicles, late winter and early spring.