Why lucky bamboo roots turn black?

Lucky bamboo roots can turn black due to several factors, including overwatering, poor drainage, or root rot caused by pathogens like fungi or bacteria. When the roots are consistently waterlogged or exposed to contaminated water, they become stressed and can decay, leading to discoloration. Additionally, exposure to low-quality water, high chlorine levels, or excessive fertilization can also contribute to this issue. To prevent black roots, it's essential to maintain proper watering practices and ensure good drainage.