The experiment was conducted in 2010-2011 in organic nurseries located in Mokra Lewa near Skierniewice and in Maków. Apple rootstocks – M.26, and sour cherry rootstocks – Mahaleb cherry (Prunus mahaleb L.), were grown on a podzolic soil at a spacing of 25 cm × 1.0 m. In the first year of running the nursery, first the rootstocks, then in the second year also the maiden trees were treated with granulated manure and the formulations Florovit Eco and Florovit Pro Nature. The control trees were not fertilized at all or fertilized with NPK. In the autumn, before digging up the trees their diameter and height were measured. The number of branched maidens, the number of shoots in the crown and the increase in length of the lateral shoots were also determined. Fertilization of apple and sour cherry maidens with the two Florovit formulations was more effective, allowing to obtain better developed maidens in terms of many features, than zero and NPK fertilization, but similar to fertilization with manure.