In the years 1988 — 1989 experiment on fertilization of 5 selected clones of bearberry Arctostaphylos uva-ursi was performed. Investigations were carried out in the conditions of container planting using as the substrate weakly loamy sand, collected in a pine forest from the surface layer covered with Calluna vulgaris. Beneficial influence of the applied fertilization on the growth of plants was stated. The sum of shoot length of all clones growing in the fertilized substrate comparing with those unfertilized was in the first year of planting 1,7 times greater, and in the second year 3,6 times greater. The total mass of leaves increased due to increased number of leaves and due to the increase of weight of single leaves. The contents of arbutin in the leaves of fertilized plants increased of 1,3% in the mean.