Bamboos are typically fast-growing perennials, with some species growing as much as 30 cm (1 foot) per day. The woody ringed stems, known as culms, are typically hollow between the rings (nodes) and grow in branching clusters from a thick rhizome (underground stem). Bamboo culms can attain heights ranging from 10 to 15 cm (about 4 to 6 inches) in the smallest species to more than 40 metres (about 130 feet) in the largest. While the narrow leaves on young culms usually arise directly from the stem rings, mature culms often sprout horizontal leaf-bearing branches. Most bamboos flower and produce seeds only after 12–120 years’ growth, and then only once in their lifetime; reproduction is largely vegetative. Some species spread aggressively and can form a dense undergrowth that excludes other plants.

Bamboos are typically fast-growing perennials, with some species growing as much as 30 cm (1 foot) per day. The woody ringed stems, known as culms, are typically hollow between the rings (nodes) and grow in branching clusters from a thick rhizome (underground stem). Bamboo culms can attain heights ranging from 10 to 15 cm (about 4 to 6 inches) in the smallest species to more than 40 metres (about 130 feet) in the largest. While the narrow leaves on young culms usually arise directly from the stem rings, mature culms often sprout horizontal leaf-bearing branches. Most bamboos flower and produce seeds only after 12–120 years’ growth, and then only once in their lifetime; reproduction is largely vegetative. Some species spread aggressively and can form a dense undergrowth that excludes other plants.