What is the slowest growing bamboo?

The slowest growing bamboo species is typically considered to be Fargesia species, particularly Fargesia murielae. This clumping bamboo grows at a rate of about 6 to 12 inches (15 to 30 cm) per year, depending on environmental conditions. Unlike more aggressive varieties, Fargesia is often favored for its ornamental qualities and suitability for colder climates. Its slower growth rate makes it ideal for smaller gardens or landscapes where control over spread is desired.