Plants not to put in a wild pond
The plants in the list here are invasive species, which we do not allow to be planted or introduced. In a larger pond, native plants such as Pendulous Sedge and Bogbean would do no harm if kept in check but ours is too small to accommodate them, attractive as they are. Alien species like Canadian Pondweed and Australian Pygmyweed are a nuisance everywhere.
The list is derived from our internal guidance documents and from The Pond Book. There is a general list of invasive species of plants and animals here, on the Web site of The Wildlife Trusts' Water Policy Team.
Balsam, Himalayan or Indian -- Impatiens glandulifera
Bogbean -- Menyanthes trifoliata
Comfrey, various -- Symphytum spp.
Duckweed, Least -- Lemna minuta
Fern, Water -- Azolla filiculoides
Hyacinth, Water -- Eichhornia crassipes
Primrose, Water -- Ludwigia grandiflora
Pigmyweed, Australian (or New Zealand) -- Crassula helmsii
Parrot's-Feather -- Myriophyllum aquaticum
Pennywort, Floating -- Hydrocotyle ranunculoides
Pondweed, Canadian -- Elodea canadensis
Pondweed, Nuttall's -- Elodea nuttallii
Reed, Common -- Phragmites australis
Reedmace, Great ('Bulrush') -- Typha latifolia
Sedge, Pendulous -- Carex pendula
Spearwort, Greater -- Ranunculus lingua
Sweet-Grass, Reed -- Glyceria maxima
Water-Lilies, various -- Nuphar spp., Nymphaea spp. and Nymphoides peltata
Waterweed, Curly -- Lagarosiphon major
We ask anyone wishing to donate any plant material to check with a knowledgeable committee member for clarification. Only if we are certain as to the identification and origin of a plant do we accept it. The same is true for dry land plants.
See Link for a list of what we do allow.