The difference between green water chestnut and red water chestnut: the growth periods of red water chestnut and green water chestnut are different, but they all belong to water chestnut. Generally speaking, red is the appearance of a water chestnut that has just grown, and it is still relatively tender. Green is the ripe appearance of water chestnut. When it is dark green or black, it means that the water chestnut is mature. The nutritional value of water chestnut is also called water chestnut, water chestnut, water chestnut and so on. It is the fruit of an annual aquatic plant water chestnut. The skin of water chestnut is crispy and fragrant. You can eat it after cooking, or you can cook porridge.