Description of Butomus umbellatus (Flowering Rush)

Butomus umbellatus, more commonly called Flowering Rush, is a perennial plant for water gardens. It grows well in wetland areas, on the edges of ponds, and in slow-moving water. This plant originally comes from Europe and Asia. You can now find it growing in many parts of North America as well.

Appearance and Growth

Flowering Rush can reach a height of 1.2 metres, or about four feet. It grows from a base cluster, producing narrow leaves that look a bit like grass. These leaves often arch over and may have a gentle twist. This growth creates a strong, upright shape. The plant forms clumps, which makes it perfect for adding vertical lines to your pond design.

Summer Flowers

In the summer, Butomus umbellatus is at its best. It sends up tall, slender stems that hold clusters of flowers. Each cluster forms a rounded head, called an umbel. The flowers are a soft pink or pale rose colour. They have a star-like shape and a light, pleasant scent. These flowers attract bees and butterflies to your garden. The blooming period lasts for several weeks, giving a long display of colour.

Planting and Care in the UK

This plant is hardy and suits UK conditions. Plant your Flowering Rush in a sunny spot. It performs best in shallow water or in damp soil at the water's edge. Ideally, submerge the roots to a depth of 5 to 25 centimetres, which is about 2 to 10 inches. It likes soil that is rich in nutrients, such as loam or clay. While it prefers constant moisture, it can cope with occasional dry spells if it is near a water source.

Spreading and Maintenance

You can propagate Butomus umbellatus quite easily. You can grow it from seed, or you can divide the root clumps. The best times for division are spring or autumn. Once the plant is settled, it needs very little looking after. In a small pond, you might need to thin it out every few years to stop it from taking over too much space.

Benefits for Your Pond

Beyond its good looks, Flowering Rush has a practical role. It offers cover and habitat for small aquatic creatures. The dense roots help to hold the soil in place. This action reduces erosion along the banks of your pond or stream. It contributes to a healthier, more balanced water garden.

Butomus umbellatus is a versatile plant. It brings both visual appeal and ecological value to any water-based planting scheme.