In close connection with the relief characteristics of the Parâng mountains, the vegetation is clearly shaped into three layers. The first layer is the broadleaf forest, which starts from the bottom of the mountains and goes as high as 1200m (northern slope) and 1400m (southern slope). They are made up of pedunculate oak, European hornbeam, silver birch and, the most common, but mostly spread on the southern slope, the European beech. The second layer mostly extended on the northern and western slopes, between 1000m and 1750m, and is composed of norway spruce forests and, locally, european silver fir. In the Parâng mountains, the tree line is situated between 1600m and 1800m.