RHS Other common names
carpenter's square, great pilewort, kernel wort, knotted figwort, murrain grass
Herbaceous Perennial Bogs
An herbaceous perennial with green, sometimes bronzy, leaves and bronze stems. Tiny, hooded, brown and green flowers are produced in whorls on stout, square stems in summer and early autumn, followed by light brown seed capsules
Position
Full sun, Partial shade
Soil Types
Clay, Loam
Max Height
0.5-1 metres
Max Spread
0.1-0.5 metres