The results presented in this paper belong to the project “Elaborarea de solutii si tehnici de cultura neconventionale si nepoluante la plantele ornamentale, în contextul dezvoltarii durabile – The elaboration of unconventional and unpollutant solutions and culture techniques, in stable usage context” and is focused on the identification of structural modifications of Chrysanthemum indicum L. stem, as a consequence of treating plants with 3 types of foliar fertilizers and biostimulants (Maxiroot, Dacmarinur Maxi N, Aurora) in 3 variants of concentrations (0.2%, 0.4%, 0.6%). The cross sections through the stem indicate a variable diameter, depending on the concentration and the applied product. The modifications appeared in the sclerification and lignification degree, development of the pith, cortex, conductive and mechanic tissues. The study recommends the usage of unpollutant foliar fertilizers and biostimulants based on plant extract, in order to develop the elements which increase plant resistance in sustaining the inflorescence, favoring their utilitarian (economic) aspects of maintaining “cut flowers”.