Overview
- In late May authorities in Hamburg, Schleswig‑Holstein, Mecklenburg‑Vorpommern, Lower Saxony and Bremen reported widespread occurrences and are actively removing dangerous specimens from parks, paths and riverbanks.
- Health agencies warn the plant’s sap is strongly phototoxic and can cause painful burns, inflammation and possible breathing problems when skin contact is followed by sunlight.
- Local governments use targeted methods to control the weed: small plants are dug out, flower heads are cut before seed set and larger stands are mown and removed for safe disposal.
- Conservation bodies run multi‑year management plans, first coordinated in 2017, because giant hogweed can form dense monocultures that crowd out native plants in nature reserves.
- Municipalities and community groups are issuing local warnings, closing or clearing affected footpaths near sites such as Sylt and Ölper See, and asking residents to avoid contact and report sightings.