The thesis presents the result of efficiency in planting sycamore maple, norway spruce, wild cherry and common beech trees and sessile oak sowing on the reorganized gravel pits. Gravel pits present the problem of forest surfacedegradation and permanent change of the soil. The study notes the appropriateness of individual tree species and their main weaknesses and strengths, depending on local conditions on the three selected plots from which data have been collected. On all three plots every planted tree has beencounted, categorized in three groups (vital, dying or damaged, dead) and compared according to the data from the planting records of the local unit Kranj (Slovenia Forest Service, OE Kranj). Then, according to the data and observation, the relative effectiveness and their viability niche has been determined on the basis of the part of the plot where they are the most successful. As it shows, the most appropriate tree species with a wide ecological amplitude is norway spruce, sycamore maple has a slightly narrower ecological amplitude, but the narrowest,amplitude completely tied to the southern part of the plane, turns out to be the common beech. Wild cherry has similar habitat requirements as maple, but it can bear less stress than maple.For this reason the wild cherry planting turns out to be inappropriate. Based on the sessile oak sowing, what ha salso been reached are negative conclusions on the suitability of this tree species for afforestation of reorganized gravel pits, As a result of future gravel pits afforestation proposals have also been made.