Arum lily

This is a wonderful architectural plant for pond margins in areas that do not suffer from very hard frosts. The leaves alone are an attraction. They are large, 40cm (16in) long, and arrow-shaped, and a bright, glossy green with distinct veins. However, arum lilies are mainly popular for their serene, white flowers. These are in fact spathes, wrapped round a thin, creamy yellow column, or spadice. They make superb, classy cut flowers. Grow the arum lily as a water plant, planting it into a special aquatic basket, in water up to 30cm (12in) deep. Or you can plant it into moist soil around the pond, protecting it with a deep mulch over winter. The Royal Horticultural Society have given it their prestigious Award of Garden Merit.

Looks good with:

Ligularia dentata 'Desdemona'
Iris pseudacorus