Habitats where giant spear moss (Calliergon giganteum) grows:
| Habitat | NVC communities | Sites |
|---|---|---|
| Blanket bog | NVC → | Sites → |
| Coastal floodplain grazing marsh | NVC → | Sites → |
| Lowland fen | NVC → | Sites → |
| Nutrient rich eutrophic lake | NVC → | Sites → |
| Purple moor grass and rush pasture | NVC → | Sites → |
| Turlough and fluctuation mere | NVC → | Sites → |
| Upland acid grassland | NVC → | Sites → |
| Upland spring flush | NVC → | Sites → |
| Wet woodland | NVC → | Sites → |