 The study found that applying humus in microbiological biostimulants to apple trees grown on rootstocks M26 and P2 resulted in the best growth, while the best fruit yield and quality parameters were obtained with microbiological biostimulants and plant amino acid formulations on rootstocks M9 and M26. Additionally, apples with the highest nutrient content were harvested from trees grown on rootstocks M9 and P22, which were stimulated with nanoparticle mineral preparations and humus formulations. This article was authored by Kioter Kikczorowski.