The paper presents the effect of the five-year operation on 10.1.15. AEF (application of eological /organic/ fertilizers) with a special emphasis on viticulture, which was the most represented within the group of perennial plantations and accounted for 60% of the reported areas, while orchards, olive groves and mixed permanent plantations together accounted for the remaining 40%. The most efficient county in 2018 was Požega-Slavonia, while in the following years the areas in Vukovar-Srijem, Osijek-Baranja and Istria counties increased. These four counties were dominant in terms of the use of AEF so that after five years of implementation (2022) they together had 84% of vineyard areas registered in AEF (and all other counties 16%), while their areas in LPIS accounted for 45% of total vineyard areas. Annual registrations of vineyard areas in AEF ranged from 1,023 ha (2018) to 5,564 ha (2022), recording a constant increase. The corresponding monetary value ranged from EUR 576,263 (2018) to EUR 3,133,800 (2022), a total of EUR 10,408,203 (HRK 78,420,607). The introduction and implementation of AEF in viticulture had significant ecological, technological and financial effects. The question remains open, "Why was the AEF not transformed into an Eco scheme, incorporated into the Ordinance on IAKS measures in 2023 and and given to producers for possible use in 2023?"