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 '''Asita, Nili''', Indigo, of which this species is a major source, has a very long history of use as a dye. Because of its fascinating deep blue colour, its Its great colour fastness to light and the wide range of colours obtained by combining it with other natural dyes, it has been called 'the king of dyes' and no other dye plants have had such a prominent place in as many civilizations as this genus.

{{Common names|kn=ajuraAjura, anjooraneeliAnjooraneeli, bangaali Bangaali neeli, hennu Hennu neeli|ml=madhuparnnikaMadhuparnnika, nilamNilam, niliNili|sa=anjanakesikaAnjanakesika, asitaAsita, bhadraBhadra, bharavahiBharavahi, neelaNeela, neelineeNeelinee, nilaNila, nilamNilam, nilapushpikaNilapushpika, shyamalikaShyamalika|ta=avuriAvuri, avuri Avuri ilai, nilamNilam|te=aviriAviri, konda Konda nili|hi=neelNeel, nilNil, nilNil-ka-jhar|en=Indigo}}

{{Leaf|pinnatePinnate|alternateAlternate|leaflets Leaflets opposite, 5-22 x 5-12 mm, elliptic to obovate, base and apex rounded, darkening on drying; stipules c. 2 mm long, subulate. }}<ref name="Leaf"/>

{{Flower|Bisexual|axillary Axillary spicate racemes|Reddish||Flowers 5-7 mm long, red; pedicels c. 1 mm long. Calyx 2-3 mm long, pubescent; lobes narrow lanceolate, acuminate. Petals reddish; standard c. 4 mm long, suborbicular. Ovary 8-12-ovuled, hairy.}}

{{Fruit|A Pod|2-3 cm long, c. 2 mm wide||linearLinear, straight or slightly curved, 8-12-seeded.|}}

Seed - pre-soak overnight in warm water and sow in a seedbed with partial shade. Germination takes about 4 days. Semi-ripe cuttings of lateral shoots with a heel. Root cuttings.<ref name="Cultivation details"/>