The habitats where saltmarsh rush~(Juncus gerardi) grows:

Brownfield
Coastal floodplain grazing marsh
Coastal vegetated shingle
Dune slack
Hard cliff and cliff slope
Lowland fen
Nutrient rich eutrophic lake
Reedbed
Saline lagoon
Salt marsh
Sand dune
Turlough and fluctuation mere
Upland spring flush