Habitats; Inula royleana is native to E. Asia – Himalayas from Pakistan to Kashmir. It grows on scrub and grassy clearings in forests, 2100 – 4000 metres. Exposed dry slopes, 3100 – 3600 metres in Kashmir.
Inula royleana is a perennial plant growing to 0.6 m (2ft) by 0.5 m (1ft 8in).
It is in flower from Aug to October, and the seeds ripen from Aug to October. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees, flies, self.The plant is self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and can grow in heavy clay soil. Suitable pH: acid, neutral and basic (alkaline) soils. It cannot grow in the shade. It prefers moist soil.
Succeeds in a sunny position in ordinary garden soil. Requires a moist well-drained soil in sun or partial shade. Grows well in heavy clay soils. This species is hardy to about -20°c. Plants take some years to become fully established.
Seed – sow spring or autumn in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Division in spring or autumn.
The plant is disinfectant. It is also considered to be poisonous. The root has been used to adulterate the roots of Saussurea lappa. It contains 3% of an alkaloid that produces a fall in blood pressure and stimulates tone and peristaltic movements in the intestines.
Disinfectant; Insecticide; Parasiticide.
Used as a parasiticide. The plant is insecticidal.
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