Fibre analysis, chemical analysis, pulping and pulp testing experiments were conducted on Muli, Mitinga, Kali, Orah and Dalu bamboos of ages ranging from 6 to 36 months. No appreciable change in chemical composition, fibre dimensions, pulp yields and physical strength properties of pulps could be monitored with increasing age. The results indicate that probably these bamboo species attain their maturity during the first year of growth. For pulping purposes, these species seem to be suitable for a twelve months cutting cycle.