Marginal pond plant
Marsh woundwort
Stachys palustris
A clump-forming herbaceous perennial for pond margins, Marsh Woundwort is suited to shallow water (plant in 2–10 cm) and is valued for wildlife. It is hardy (RHS H7) and grows to around 50–100 cm.
PLANT PROFILE
About Marsh woundwort
Marsh woundwort (Stachys palustris) is a clump-forming, herbaceous perennial commonly recommended for pond margins and damp banks. Freshwater Habitats Trust and RHS list it among marginal plants suitable for garden and wildlife ponds; it is particularly appropriate for shallow-margin planting where roots sit in a few centimetres of water. Planting guidance from Freshwater Habitats Trust specifies placing plants so roots are in 2–10 cm of water.
RHS gives a mature size range up to roughly 0.5–1.0 m in height and spread, and recommends growing it in full sun to partial shade. The plant flowers in mid-summer (RHS wording) and is included in RHS pollinator and ponds/pond-margin wildflower lists, indicating clear wildlife and pollinator value. It is also recorded as native to Great Britain and Ireland in the RHS profile and is presented in native wetland species lists.
In cultivation it is hardy (RHS H7) and generally described as easy to establish in suitable damp situations. RHS lists propagation by seed or by division. Maintenance is straightforward: the species is generally pest- and disease-free, requires no regular pruning, and can be cut back in autumn. Freshwater Habitats Trust advises managing vigorous marginal species by thinning or removing seed heads where necessary to prevent dominance and to encourage a diverse pond margin. When removing plant material, follow responsible disposal guidance — the supplied GOV.UK guidance describes legal frameworks and recommended disposal methods for invasive non-native plants; the documents examined did not identify Marsh woundwort as a listed regulated species, but responsible disposal is still advised.
Overall, Marsh woundwort is a robust native choice for pond edges and damp banks, useful for wildlife and suitable for garden and small-pond margins where shallow planting is provided.
POND SUITABILITY