Dahlias are tuberous perennials, and most have simple leaves that are segmented and toothed or cut.
The compound flowers may be white, yellow, red, or purple in colour.
The stems are leafy, ranging in height from as low as 30 cm (12 in) to more than 1.8–2.4 m (6–8 ft).
The species vary in height, from the 40 cm (1 ft) right up to 2 metres (7 ft).
Dahlia performs best in rich, moist and well drained soil that is slightly acidic.
The plant is also used for dying.
Both the tuberous roots and the flowers of this ornamental and medicinal plant are used for therapeutic purposes.