The habitats where rosebay willowherb~(Chamerion angustifolium) grows:

Arable
Atlantic oak wood
Beech wood
Bracken scrub
Brownfield
Damp fertile disturbed
Gateways and tracks
Hard cliff and cliff slope
Lowland dry acid grassland
Lowland dry oak and birch wood
Lowland fen
Lowland mixed oak and ash wood
Nutrient rich eutrophic lake
Open habitat arable weed fertile loam and clay
Pond ditch and canal
Raised bog
Sand dune
Traditional orchard
Upland acid grassland
Upland birch wood
Upland mixed ash wood
Wet woodland
Wood pasture