Water the golden bamboo three times a week during the summer. If temperatures are over 90 degrees, you may need to water five days a week. Keep an eye on the moisture content of the soil, and if it appears to be drying quickly, give the bamboo some water.Fertilize the golden bamboo once a month with a 17-6-2 slow-release fertilizer. Follow the label directions for dosage.eep an eye on the moisture content of the soil, and if it appears to be drying quickly, give the bamboo some water. Fertilize the golden bamboo once a month with a 17-6-2 slow-release fertilizer. Follow the label directions for dosage.