Greater Knapweed

Centaurea scabiosa

Physical Characteristics

Centaurea scabiosa is a PERENNIAL growing to 0.9 m (3ft). See above for USDA hardiness. It is hardy to UK zone 4. It is in flower from July to September, and the seeds ripen from August to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). The plant is self-fertile. It is noted for attracting wildlife. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils and can grow in very alkaline soils. It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Distribution

Much of Europe, including Britain, north to 68° N., east to the Caucasus and W. Asia.

Habitats

Meadow; Cultivated Beds;

Edible Uses

None known

Medicinal Uses

Diaphoretic Diuretic Tonic Vulnerary The roots and seeds are diaphoretic, diuretic, tonic and vulnerary[4]. The plant once had a very high reputation as an ingredient of the Medieval 'salve', an ointment applied to heal wounds and treat skin infections[4, 254].

Known Hazards

None known