M. sylvestris is an erect perennial that throws up flowering spikes up to 1.5m in height in summer and autumn. Flowers are grouped in the leaf axils and are five-petalled, notched and pink. Leaves are rounded at the base of the plant, but five-lobed on the stems
Sowing: March to June. Or plant in Autumn directly into your flower bed for an early flower display the following year.