Ground lupins are a 100% natural organic fertilizer obtained by grinding Lupinus albus seeds, mainly used to feed citrus plants, acid-loving plants, such as azaleas and camellias, and potted plants. Rich in slow-release nitrogen, they improve soil structure, increasing its fertility and acidity. They release nitrogen gradually, ensuring healthy development of leaves and flowers. They are considered the best natural fertilizer for lemons, oranges and mandarins, promoting lush fruiting. They are odourless and allowed in organic farming.