The Boč Nature Reserve comprises exceptionally important elements of the natural heritage of forest stands, geomorphological, botanical and dendrological features, and also elements of the typical cultural landscape and building tradition. The forest area gives the impression of a primeval forest; a particularity of the area is the sharp-leaved maple. On the southern slopes at the top of Boč there is a growing site of Illyrian vegetation.
The most characteristic of all the protected and rare plants is the greater pasque flower (Pulsatilla grandis). It grows around the little church of St Nicholas.
Its violet flowers open early in spring. Besides the pasque flower, the slopes of Boč are also adorned by the fragrant daphne and the auricula.