Schedule 9
Schedule 9 of the Wildlife and Countryside Act 1981 lists plants that may not be planted or otherwise caused to grow in the wild. It applies throughout England, Wales and Scotland. The species are all alien (non-native) species that have the potential to spread rapidly to the detriment of the native species.
Myriophyllum aquaticum is one of several prohibited aquatic plants that can choke waterways.
Crocosmia × crocosmiiflora is one of a number of popular garden plants that readily escaped from cultivation.
As well as being an invasive species, Heracleum mantegazzianum is also dangerous to human health through its photosensitising sap.
- Allium paradoxum (M. Bieb.) G. Don – few-flowered garlic
- Allium triquetrum L. – three-cornered garlic
- Azolla filiculoides Lam. – water fern
- Cabomba caroliniana A. Gray – Carolina water-shield
- Carpobrotus edulis (L.) N. E. Br. – Hottentot fig
- Cotoneaster bullatus Bois – holly-berry cotoneaster
- Cotoneaster horizontalis Decne. – wall cotoneaster
- Cotoneaster integrifolius (Roxb.) G. Klotz – entire-leaved cotoneaster
- Cotoneaster microphyllus Wall. ex Lindl. – small-leaved cotoneaster
- Cotoneaster simonsii Baker – Himalayan cotoneaster
- Crassula helmsii (Kirk) Cockayne – New Zealand pigmyweed
- Crocosmia × crocosmiiflora (Lemoine) N. E. Br. – montbretia
- Disphyma crassifolium (L.) L. Bolus – purple dewplant
- Elodea canadensis Michx. – Canadian waterweed
- Elodea nuttallii (Planch.) H. St. John – Nuttall’s waterweed
- Fallopia japonica (Houtt.) Ronse Decr. – Japanese knotweed
- Fallopia × bohemica (Chrtek & Chrtková) J. P. Bailey – Conolly’s knotweed
- Fallopia sachalinensis (F. Schmidt) Ronse Decr. – giant knotweed
- Gunnera tinctoria (Molina) Mirb. – giant rhubarb
- Heracleum mantegazzianum Sommier & Levier – giant hogweed
- Hydrocotyle ranunculoides L. f. – floating pennywort
- Impatiens glandulifera Royle – Indian balsam
- Lagarosiphon major (Ridl.) Moss ex V. A. Wager – curly waterweed
- Lamiastrum galeobdolon subsp. argentatum (Smejkal) Stace – variegated yellow archangel
- Ludwigia grandiflora (Michx.) Greuter & Burdet (= Ludwigia uruguayensis (Cambess.) H.Hara) – water primrose
- Ludwigia peploides (Kunth) P. H. Raven – creeping water-primrose
- Myriophyllum aquaticum (Vell.) Verdc. – parrot’s feather
- Parthenocissus vitacea (Knerr) Hitchc. – false Virginia creeper
- Parthenocissus quinquefolia (L.) Planch. – Virginia creeper
- Pistia stratiotes L. – water cabbage
- Rhododendron luteum Sweet – yellow azalea
- Rhododendron ponticum L. – rhododendron
- Rhododendron × superponticum Cullen – hybrid rhododendron
- Rosa rugosa Thunb. – Japanese rose
- Sagittaria latifolia Willd. – duck-potato
- Salvinia molesta D. Mitch. – Kariba weed
- Smyrnium perfoliatum L. – perfoliate alexanders
