Climbing dayflower is a weed that grows in Hawaii and warm climate states such as Texas, Louisiana, and Mississippi. This species is widespread throughout the world's warmer temperate regions in Africa, Asia, and the Pacific in forests, wetlands, marshes, and floodplains. Despite its attractive small blue flowers, it can be difficult to control in a garden setting. It is listed as a noxious weed by the US Department of Agriculture and by the state of Florida. It does not appear on state or national invasive species lists. The weed invades crop fields and competes for nutrients and light. Use hoeing, hand extractions, and herbicides for controlling spread.