The flora of the region is influenced by the geological bedrock of the area, the ruggedness of the terrain, its position at the edge of the Baltic maritime climate zone and by human activity. On the rocky edges and plateaux we can find boreo-continental pine forests with heather (Calluna vulgaris), cowberry (Vaccinium vitis-idaea), blueberry (Vaccinium myrtillus) and wavy hair-grass (Avenella flexuosa). On the cold valley floors are natural spruce communities, accompanied by ferns, e.g. holly fern (Blechnum spicant), mosses and lichens but also white butterbur (Petasites albus) and clasp-leaf twisted-stalk (Streptopus amplexifolius). The local rarity is the occurrence of the killarney fern (Trichomanes speciosum) which only reproduces vegetatively.
On basalt or granite bedrock areas there are forest communities of herb-rich beech forest, with a rich undergrowth of coral toothwort (Dentaria bulbifera) and nine-leaved toothwort (Dentaria enneaphyllos), sweet woodruff (Galium odoratum), early dog violet (Viola reichenbachiana), the melic grasses Melica uniflora and Melica nutans, bulbous fumitory (Corydalis cava) and mezereon (Daphne mezereum).
Peat bogs only make up a very small part of PLA, but are of exceptional botanical significance. Typical plant species for these localities are labrador tea (Ledum palustre), bog whortleberry (Vaccinium uliginosum), the cranberry Oxycoccus palustris, hare’s-tail cottongrass (Eriophorum vaginatum) along with a number of mosses including sphagnum bog moss (Sphagnum sp.div.) and the haircap moss Polytrichum sp.div.
On waterlogged, wetland and low-bog meadows we can find a wetland plant community with typical species such as broad-leaved marsh orchid (Dactylorhiza majalis), bogbean (Menyanthes trifoliata), spring snowflake (Leucojum vernum), hare’s-tail cottongrass (Eriophorum angustifolium) and broad-leaved cottongrass(Eriophorum latifolium), marsh valerian (Valeriana dioica), meadowsweet (Filipendula ulmaria) and globe flower (Trollius altissimus).