Swansea & Gower invasive plant guide
SwanseaWeed Control

Highest risk

Japanese knotweed removal

Swansea is one of the worst-affected places in Britain. Knotweed dominates back lanes, railway embankments, riverbanks and derelict plots ac…

High risk

Himalayan balsam removal

The pink-flowered annual that lines almost every stream in Swansea. One plant throws up to 2,500 seeds and the seed floats, so a single upst…

Highest risk

Giant hogweed removal

The one that hurts people. Its sap makes skin blister badly in sunlight, and the burns can recur for years. Children are most often affected…

High risk

Rhododendron ponticum removal

A Victorian garden shrub that has swallowed large parts of Clyne Valley and the Gower woodlands, turning ancient woodland floor into bare, d…

Moderate risk

Wall cotoneaster removal

Birds carry the berries from gardens straight onto Gower's limestone cliffs and grasslands, where cotoneaster smothers some of the rarest pl…

Moderate risk

Three-cornered leek removal

Sometimes picked as wild garlic. It carpets shady verges, churchyards and hedge banks across west Swansea and Gower, replacing native bluebe…

Watch list

Japanese rose removal

A thorny dune invader. It binds and over-stabilises mobile sand, which is exactly the wrong thing for Swansea Bay and Gower dune systems tha…

Watch list

Montbretia removal

The orange garden crocosmia that has escaped into hedge banks and coastal paths all over Gower, forming solid corm mats that nothing else gr…

High risk

Running bamboo removal

Increasingly planted as a garden screen, running bamboo behaves like knotweed: its underground rhizomes travel metres under fences, patios a…

Moderate risk

Buddleia (butterfly bush) removal

The purple butterfly bush that seeds itself into every wall, bridge joint and chimney in Swansea. It is a genuine problem for buildings: roo…

High risk

Cherry laurel removal

The common estate hedge that has escaped into Gower and Clyne woodlands. A mature cherry laurel casts shade so deep nothing grows beneath it…

Moderate risk

Himalayan honeysuckle removal

A garden escape with pendulous maroon-and-white flowers that has jumped from borders into Swansea's lanes and woodland edges, forming dense …

Moderate risk

American skunk cabbage removal

A pond-garden plant with striking yellow arum flowers that has escaped into wet ground and streamside margins, where it forms dense crowds t…

High risk

New Zealand pygmyweed removal

A tiny aquarium plant that is one of Britain's most destructive pond invaders. A single fragment regrows into a new mat, and once establishe…

Every area

Invasive weed waste clearance

Lawful clearance of cut weeds, roots and affected soil. Choose your area to see local details.