I don't know of any "one" orchid being a real fast grower I have a couple in several different species that grow great when you take care of them properly. For the most part Orchids are only going to grow one to two new plant growths a year.
A species of chinese bamboo is the fastest growing plant in the world.
Sao Paulo in Brazil is one of the largest and fastest growing cities in the world.
Wicca is the fastest growing in terms of growth to existing size
Islam the world's fastest growing religion today and tomorrow
Belarus has the fastest growing economy in Europe, and the 27th in the world.
Islam is the fastest growing religion in the Scotland.not only in the Scotland but in the world.
it is not second growing but the first growing religion in world.
tourism
Himalayas
third world countries
In the western world, its Wicca
Islam is the fastest growing religion in 2010 and has been for a long time.