Bamboo is a type of grass with hollow, woody stems that grows in warm temperatures. There are many different types of bamboo -- more than 1000 different species around the world. How quickly bamboo grow depend on the species and environmental factors. Tropical species tend to grow the fastest. Giant bamboo plants in the rainforest can grow as much as 9 inches (23 cm) in a single day, although some can grow even faster. As of 2015, the Guinness world record for the fastest growing plant belongs to a bamboo. The tallest recorded tropical bamboo is 40 meters (130 ft) long.
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