Floating pond plant
Water hawthorn
Aponogeton distachyos
Aponogeton distachyos is a tuberous, floating‑leaved aquatic with small fragrant white flowers that thrives in still water of about 30 cm or deeper; it can spread readily and is non‑native to the UK.
PLANT PROFILE
About Water hawthorn
Water hawthorn (Aponogeton distachyos) is a tuberous aquatic often used in ornamental garden ponds for its floating leaves and delicate, fragrant white flowers held just above the water. It grows from tubers anchored in pond mud or from submerged containers, producing floating foliage that provides resting/shading for pond wildlife. RHS guidance places the species in still water of around 30 cm or more and notes it prefers full sun to partial shade.
Because it is tuberous and capable of rapid spread in favourable conditions, gardeners should monitor plant growth and be prepared to divide or remove material to prevent it becoming dominant. RHS also warns that water hawthorn can be eaten by water snails, so inspect plants for snail damage and consider this when choosing a site. In winter the above‑water foliage is described as deciduous while the tuberous rootstock persists.
Propagation can be by division of tubers or by seed, according to RHS propagation guidance. When planting, place tubers anchored in pond mud or in submerged containers as instructed by RHS; specific numeric planting depths for the tuber are not given in the supplied sources. The plant can form a substantial spread (RHS notes up to 0.5–1 m overall) despite a modest leaf height.
Legally, supplied UK government guidance records Aponogeton distachyos as a non‑native species of interest in technical literature but does not list it on Schedule 9 of the Wildlife and Countryside Act 1981. Gardeners should therefore take sensible precautions to avoid accidental introductions to wild water bodies and manage plant material carefully, although no statutory prohibition was identified in the supplied documents. Overall, water hawthorn is an attractive pond plant with wildlife value but requires active management to prevent nuisance spread and monitoring for snail damage.
POND SUITABILITY