4. Water - Bamboo is a grass and just like your lawn, it needs plenty of water. For the first month, water bamboo deeply each day, always in the morning. In the second month, water every other day and in the third month, water twice each week. After the third month, keep the watering at twice each week when it is hot and just once per week when it is cool. Leaf wilt, curl or drop are all signs that you aren't giving your bamboo enough water.