The forests along the Krka River do not cover large areas of land, but they are of great importance for the overall landscape experience in an area of such contrasts between the rough karst, river and the sea.
Three forest communities dominate: mixed forests of holm oak and flowering ash (Orno-Quercetum ilicis), mixed forests of downy oak and white hornbeam (Querco-Carpinetum orientalis), and black hornbeam forests with autumn moor grass (Seslerio-Ostryetum). Due to centuries of exploitation, the downy oak and white hornbeam forests are now rare, and are most commonly found only in the form of low forests and thickets.
The forest community of holm oak and flowering ash is developed on the steep, sunny slopes, while the black hornbeam forests with autumn moorgrass are common on the shady slopes, and both are typical of the Croatian coastal areas. In addition to these forests communities, in the early 20th century, a large area around Skradinski buk was planted with Aleppo pine (Pinus halepensis) and black pine (Pinus nigra). Upstream to Roški slap, floodplain forests and thickets are common along the river's edge, dominated by willows (Salix alba, S. cinerea, S. fragilis, S. purpurea), black alder (Alnus glutinosa), black and white poplars (Populus nigra and P. alba) and narrow-leaf ash (Fraxinus angustifolia).