The researchers' interest for the olive tree is probably as old as the millennial olive cultivation is. In spite of that, the knowlege about olive nutrient needs, especially about its impact on growth, development and the quality of planting material, are still insufficient. Since the container olive nursery plant production takes 12 to 18 months with all the necessary agro-tehnical operations, it's important to ensure optimal nutrient status of the seedlings as a perequisite for achiving physiological balance during that period. The types and amounts of nutrients and their relations should be adjusted to cultivar, plant nutrient capacity of the breeding substratum and dynamics of other biotic and abiotic factors. There are different approaches for achieving these goals. Some people take substrate analysis as a starting point for determining types and amounts of fertilizers, while others take plant material analysis. However, the right approach are not only supstrate and plant material analysis but also valorization of planting material quality. The fertilization experiment was set on three-months old rooted olive cuttings growen in pots. The main goal of the experiment was to enable the production of planting material of good quality and determine the optimal types and amounts of fertilizers and the method of their application in the plant material production of Croatian most common cultivar „Oblica“. The experiment was designed as a „Latin square“ with seven (7) fertilizer treatments in seven (7) repetitions. During the experiment the substrate was analyzed three times, the plant material (leaves) twice and leachate (from pots) five times. Results showed that all the treatmens applied in the experiment caused higher plant growth (except Fer3 treatment) in relation to Control. There were a highly significant differences between treatments in the leaf dry matter content of N, P, K, Ca, Fe, Zn, Mn and Cu, while there were significant differences between treatments in the leaf dry matter content of Mg and Zn. Nitrate, potassium and chloride concentrations in leachates have not exceeded the maximum allowed concentration prescribed by the Pravilnik o parametrima sukladnosti i metodama analize vode za ljudsku potrošnju (NN 125/2013), which indicates that there is no negative impact on the pollution of ground and surface waters regarding above-mentioned iones.