Lucky bamboo is, in fact, not a bamboo. It is a form of water lily that looks very much like a true bamboo. As a water lily, lucky bamboo grows primarily in water. Most lucky bamboo plants you buy, either as a single cane or as an arrangement, have had the growth node removed and will not grow taller. Aside from simply providing nutrition needed by your bamboo cane or arrangement, the only thing you can affect is leaf size. Lucky bamboo is very resilient and very easy to care for.
Remove your lucky bamboo from its water every two to three weeks.
Rinse the roots of your canes in fresh running water to remove slime and buildup that can interfere with nutrient uptake.
Dump the water in your container carefully. Try to avoid disturbing the soil or sand at the bottom of the container.
Refill your container with clean bottled water. Pour the water gently against an inside surface to avoid, as much as possible, disturbing the soil. Lucky bamboo can be sensitive to the fluoride in some municipal water supplies, so you are better off always using bottled water.
Put your lucky bamboo back in the water and make sure the roots are buried in the soil, sand or rocks in the bottom of the container.
Keep your lucky bamboo out of the sun. Lucky bamboo is a shade plant. Full sun can cause your leaves to yellow and may eventually kill your lucky bamboo. Lucky bamboo can survive very well in rooms with no natural light.
Keep your lucky bamboo in temperatures above 65 degrees F. Lucky bamboo will die at temperatures below 55 degrees F.