Invasive Plants of National Concern
Please see and refer to the original text of S.I. No. 374 of 2024
| Scientific name | Common name | Geographic scope | Entry into force |
| Lysichiton americanus | American skunk-cabbage | Throughout the State | 2024 |
| Grateloupia doryphora | A red alga | Throughout the State | 2024 |
| Gunnera manicata | Brazilian giant-rhubarb | Throughout the State | 2024 |
| Juncus planifolius | Broad-leaved rush | Throughout the State | 2024 |
| Aponogeton distachyos | Cape pondweed | Throughout the State | 2024 |
| Spartina (all species and hybrids) | Cord-grasses | Throughout the State | 2024 |
| Lagarosiphon major | Curly waterweed | Throughout the State | 2024 |
| Zostera japonica | Dwarf eel-grass | Throughout the State | 2024 |
| Cabomba caroliniana | Fanwort | Throughout the State | 2024 |
| Hydrocotyle ranunculoides | Floating pennywort | Throughout the State | 2024 |
| Nymphoides peltata | Fringed water-lily | Throughout the State | 2024 |
| Heracleum mantegazzianum | Giant hogweed | Throughout the State | 2024 |
| Reynoutria sachalinensis | Giant knotweed | Throughout the State | 2024 |
| Gunnera tinctoria | Giant-rhubarb | Throughout the State | 2024 |
| Salvinia molesta | Giant salvinia | Throughout the State | 2024 |
| Impatiens glandulifera | Himalayan balsam | Throughout the State | 2024 |
| Koenigia polystachya | Himalayan knotweed | Throughout the State | 2024 |
| Carpobrotus edulis | Hottentot-fig | Throughout the State | 2024 |
| Reynoutria japonica | Japanese knotweed | Throughout the State | 2024 |
| Egeria densa | Large-flowered waterweed | Throughout the State | 2024 |
| Polygonum perfoliatum | Mile-a-minute weed | Throughout the State | 2024 |
| Crassula helmsii | New Zealand pigmyweed | Throughout the State | 2024 |
| Myriophyllum aquaticum | Parrot ’s feather | Throughout the State | 2024 |
| Rhododendron ponticum
(including R.x superponticum) |
Rhododendron | Throughout the State | 2024 |
| Rubus spectabilis | Salmonberry | Throughout the State | 2024 |
| Hippophae rhamnoides | Sea-buckthorn | Throughout the State | 2024 |
| Hyacinthoides hispanica | Spanish bluebell | Throughout the State | 2024 |
| Allium triquetrum | Three-cornered leek | Throughout the State | 2024 |
| Undaria pinnatifida | Wakame | Throughout the State | 2024 |
| Trapa natans | Water chestnut | Throughout the State | 2024 |
| Azolla filiculoides | Water fern | Throughout the State | 2024 |
| Ludwigia (all species) | Water-primrose | Throughout the State | 2024 |
| Elodea (all species except Elodea Canadensis) | Waterweeds | Throughout the State | 2024 |
| Sargassum muticum | Wireweed | Throughout the State | 2024 |