Black spots on cilantro are caused by the presence of bacteria that are in the soil surrounding it. They can also develop from over-watering or too much sun exposure.
Cilantro is a popular herb that is often used as a garnish for Mexican and Asian dishes and salads. While this herb has become more common in kitchens all around the world, it also poses certain hazards that need to be addressed. Black spots on cilantro can cause foodborne illnesses if not addressed early enough and are often confused for mold or other contaminants in foods.