What is the fasting growing plant?

The fastest-growing plant is bamboo, with some species capable of growing about 91 centimeters (35 inches) in a single day.

Bamboo is not one plant but a large group of grasses belonging to the subfamily Bambusoideae. Its remarkable speed comes from underground rhizomes and specialized growth zones at the nodes of its hollow stems. Multiple sections can extend at once, allowing a new shoot to gain height rapidly under ideal conditions.

Guinness World Records recognizes certain bamboo species from roughly 45 genera as holding the fastest plant-growth record. However, bamboo does not grow at that speed everywhere: temperature, water, soil, sunlight and species all affect its rate. The 91-centimeter figure is a maximum recorded rate, not a universal daily average.

Another common misconception is that every bamboo species is invasive or equally fast-growing. Some species spread aggressively through runners, while clumping varieties expand more slowly. Bamboo is also one of the world’s most useful plants, serving as food, construction material and fiber.