The habitats where slender St John's-wort~(Hypericum pulchrum) grows:

Altantic hazel wood
Atlantic oak wood
Beech wood
Blanket bog
Brownfield
Caledonian forest
Coastal floodplain grazing marsh
Hard cliff and cliff slope
Limestone pavement
Lizard peninsula
Lowland calcareous grassland
Lowland dry heath
Lowland fen
Lowland heath
Lowland wet heath
Montane dwarf shrub heath
Mountain ledge
Pond ditch and canal
Purple moor grass and rush pasture
Raised bog
Upland acid grassland
Upland birch wood
Upland calcareous grassland
Upland dry heath
Upland spring flush
Upland wet heath
Wood pasture