Pistachio fertilization requires a balanced, long-term approach. It is a slow-developing crop with a deep root system and high sensitivity to nitrogen excess. It mainly demands potassium and phosphorus, elements that sustain productivity and fruit quality, while nitrogen inputs must be carefully managed to avoid excessive shoot growth and yield alternation. Moreover, since pistachios are often established in calcareous soils with low organic matter, it is essential to choose fertilizers that enhance soil structure, biological activity, and real nutrient availability.