Soak bamboo stalks in water for three months.
Drive the stalks vertically into the ground in a sunny location, using a mallet. Let them air dry for two weeks. Drying the stalks vertically at first will prevent fungus from attacking.
Lay the stalks horizontally on ventilated drying racks. Leave them in a cool, well-ventilated room or under a tent out of direct sunlight to prevent rapid changes in temperature or moisture content.
Rotate the stalks every 15 days to promote uniform drying. Depending on the air quality and the size of the stalks, they should dry out completely within six to 12 weeks.