Walnut must be watered carefully and regularly, especially in the first years with being a plant that does not want much water. Rainfall in the spring is generally sufficient but water should be provided as needed. Summer watering is very important. Depending on the rainfall situation, irrigation can be started as of mid-May or the first week of June. If the spring is dry, the water must be started early. Otherwise the fruiting and quality will decrease. The mistake made in the irrigation (inadequate and irregular irrigation) can cause fruit to fall in June. In walnuts, irrigation is very important especially in small fruits, in filling periods and in the periods near to getting bigger. In whichever condition walnut sapling and walnut garden are the ideal way to irrigate is drip irrigation or leakage irrigation.