The habitats where bulbous rush~(Juncus bulbosus) grows:

Blanket bog
Coastal floodplain grazing marsh
Fast flowing river and stream
Limestone pavement
Lowland dry heath
Lowland fen
Marginal and inundation
Nutrient rich eutrophic lake
Peat stained (dystrophic) water
Pond ditch and canal
Purple moor grass and rush pasture
Raised bog
Reedbed
Sluggish river and stream
Turlough and fluctuation mere
Upland lake loch and tarn
Upland rush pasture
Upland spring flush
Upland wet heath
Valley mire