Costus dubius is a species of plant native to Tropical Africa.

[1][2] Costus dubius has underground rhizomes which produce leafy stems and inflorescences on separate stalks.

[2] Costus dubius has a wide native range and can be found throughout tropical Africa.

[2] Costus dubius has been introduced to several places in which it has become naturalized or invasive including: In its native Africa, Costus dubius is found in many different types of forest, as well as along rivers and roads and in plantations.

[2] Costus dubius prefers wet tropical biomes and does not appear to survive in the subtropics.