Greening may refer to: People Greening (surname) Other uses greening, the act or process of becoming 'green' or environmentally friendly Greening Australia Greening Greater Toronto Greening Earth Society citrus greening disease, or Huanglongbing, a citrus disease caused by the bacterium, Candidatus Liberibacter spp. De-etiolation, or greening, the changes in a plant when it finally obtains light, such as when emerging from the ground or after insufficient light exposure Greening, Michigan, a former community See also Greening's Frog The Greening of America