Add 5 gallons of water to a tub or bucket that has a lid.
Place the bamboo stalks unmodified in the tub of water.
Place a lid over the tub to prevent evaporation. Soak the stalks in the water for 90 days to allow the bamboo to absorb the water.
Place the bamboo in a sunny area for two weeks to dry unless you live in a very hot climate. If the temperature gets above 95 degrees Fahrenheit, place the bamboo in the shade to prevent cracking.
Light some charcoals and heat to approximately 250 degrees Fahrenheit, using a barbecue grill or a fire pit is ideal for this.
Hold the bamboo over the charcoals and slowly twist the bamboo to heat evenly. When the bamboo turns yellow, it is time to remove the bamboo from the heat.
Wipe off any resin that has come to the surface of the bamboo.
Set the bamboo aside for two weeks in moderate sunlight to continue drying.
Cut the bamboo at the top and the bottom with a strong pair of garden shears. Leave the leaves intact.
Place the bamboo upright in the Sun for two weeks. Placing it just inside a windowsill that gets direct sunlight is a good option to prevent the bamboo from getting dirty.
Move the bamboo to a cool place that is out of direct sunlight. A cabinet or inside a closet is a good place to store the bamboo. When the stalk turns yellow, the bamboo has been cured.