The habitats where crested hair-grass~(Koeleria macrantha) grows:

Brownfield
Calaminarian grassland
Hard cliff and cliff slope
Limestone pavement
Lizard peninsula
Lowland calcareous grassland
Lowland dry acid grassland
Lowland dry heath
Lowland heath
Lowland meadow and pasture
Machair sand dune
Maritime cliff
Pond ditch and canal
Rocky slope
Sand dune
Traditional orchard
Upland calcareous grassland