Changes

''C. crepidioides'' occurs as a weed on arable land, riversides, roadsides, tea, coffee, cinchona, sweet potato, taro and citrus plantations, and in upland rice fields, particularly in wetter localities, at 200-2500 m altitude. It may also be a dominant pioneer species in shifting cultivation sites that have been recently burned.

Under experimental conditions, seeds stored under dry conditions still germinated after 20 months, but after 22 months of dry storage they began to lose their viability.