Managing invasive plants in your garden

Some invasive non-native plants have additional controls around their disposal.

If you have an invasive plant in your garden that you want to control or remove, the following links provide useful information you should check before you do so:

Read more on legislation relating to non-native species.

Restrictions on non-native plants

It is illegal to plant or otherwise cause to grow in the wild any plants listed on Schedule 9 of the Wildlife and Countryside Act. These species are listed in the table below. In Scotland it is an offence to allow any non-native plant to grow in the wild.

You may wish to avoid growing these species in your garden as they can be difficult to manage. Find suggestions for non-invasive alternatives in these guides produced by Plantlife.

Restrictions also apply to 36 species of non-native plants listed as of concern to the EU, listed in the table below. Read more on these restrictions and how they affect you.

Other plants which are known to be a problem for gardeners

The following non-native plants are other examples of species (not listed above) that are known to be invasive and may be difficult to manage.

If you have any of these plants in your garden or pond, remember to prevent them from spreading into the wild and dispose of them responsibly.

  • All species of the genus Petasites
  • Bear's breech, Acanthus mollis
  • Large flowered waterweed, Egeria densa
  • Pheasant's tail grass, Anemanthele lessoniana

Plants listed on Schedule 9 of the Wildlife and Countryside Act and / or Species of Union Concern

Common name Scientific name Schedule 9 Species of Union Concern
Alligator weed Alternanthera philoxeroides Yes
American skunk cabbage Lysichiton americanus Yes
Asiatic tearthumb Persicaria perfoliata (Polygonum perfoliatum) Yes
Australian Swamp Stonecrop (or New Zealand Pigmyweed) Crassula helmsii Yes
Balloon vine Cardiospermum grandiflorum Yes
Broadleaf watermilfoil Myriophyllum heterophyllum Yes
Broomsedge bluestem Andropogon virginicus Yes
Californian red seaweed Pikea californica Yes
Chinese bushclover Lespedeza cuneata (Lespedeza juncea var. sericea) Yes
Chinese tallow Triadica sebifera (Sapium sebiferum) Yes
Cotoneaster Cotoneaster horizontalis Yes
Crimson fountaingrass Pennisetum setaceum Yes
Curly Waterweed Lagarosiphon major Yes Yes
Duck Potato Sagittaria latifolia Yes
Eastern Baccharis Baccharis halimifolia Yes
Entire-leaved Cotoneaster Cotoneaster integrifolius Yes
False Virginia Creeper Parthenocissus inserta Yes
False-acacia Robinia pseudoacacia Yes
Few-flowered Leek Allium paradoxum Yes
Floating Pennywort Hydrocotyle ranunculoides Yes Yes
Floating Water Primrose (Floating primrose willow) Ludwigia peploides Yes Yes
Giant Hogweed Heracleum mantegazzianum Yes Yes
Giant Kelp Macrocystis angustifolia Yes
Giant Kelp Macrocystis integrifolia Yes
Giant Kelp Macrocystis laevis Yes
Giant Kelp Macrocystis pyrifera Yes
Giant Knotweed Fallopia sachalinensis Yes
Giant Rhubarb (Chilean rhubarb) Gunnera tinctoria Yes Yes
Golden wreath wattle Acacia saligna (Acacia cyanophylla) Yes
Green cabomba (Fanwort, Carolina Water- Shield) Cabomba caroliniana Yes Yes
Green Seafingers Codium fragile Yes
Green Seafingers Codium fragile tomentosoides Yes
Himalayan Balsam Impatiens glandulifera Yes Yes
Himalayan Cotoneaster Cotoneaster simonsii Yes
Hollyberry Cotoneaster Cotoneaster bullatus Yes
Hooked Asparagus Seaweed Asparagopsis armata Yes
Hottentot Fig Carpobrotus edulis Yes
Hybrid Knotweed Fallopia japonica x Fallopiansachalinensis Yes
Japanese hop Humulus scandens Yes
Japanese Kelp Laminaria japonica Yes
Japanese Knotweed Fallopia japonica Yes
Japanese Knotweed Polygonum cuspidatum Yes
Japanese Rose Rosa rugosa Yes
Japanese Seaweed Sargassum muticum Yes
Japanese stiltgrass Microstegium vimineum Yes
Kudzu vine Pueraria montana var. lobata (Pueraria lobata) Yes
Laver Seaweeds (except native species) Porphyra spp (except P. amethystea, P. leucosticte, P. linearis, P. miniata, P. purpurea & P. umbilicalis) Yes
Mesquite Prosopis juliflora Yes
Milkweed Asclepias syriaca Yes
Montbretia Crocosmia x crocosmiiflora Yes
Nuttall's waterweed Elodea nuttallii Yes
Parrot's feather Myriophyllum aquaticum Yes Yes
Perennial veldtgrass Ehrharta calycina Yes
Perfoliate Alexanders Smyrnium perfoliatum Yes
Persian hogweed Heracleum persicum Yes
Purple Dew plant Disphyma crassifolium Yes
Purple pampas grass Cortaderia jubata Yes
Red algae Grateloupia luxurians Yes
Rhododendron Rhododendron ponticum Yes
Rhododendron Rhododendron ponticum x Rhododendron maximum Yes
Salvinia moss (Giant Salvinia) Salvinia molesta (Salvinia adnata) Yes Yes
Senegal tea plant Gymnocoronis spilanthoides Yes
Shallon Gaultheria shallon Yes
Small-leaved Cotoneaster Cotoneaster microphyllus Yes
Sosnowski's hogweed Heracleum sosnowskyi Yes
Three-cornered Garlic Allium triquetrum Yes
Tree of heaven Ailanthus altissima Yes
Variegated Yellow Archangel Lamiastrum galeobdolon subsp. Argentatum Yes
Vine-like fern Lygodium japonicum Yes
Virginia Creeper Parthenocissus quinquefolia Yes
Wakame Undaria pinnatifida Yes
Water Fern Azolla filiculoides Yes
Water Hyacinth Eichhornia crassipes Yes Yes
Water Lettuce Pistia stratiotes Yes
Water Primrose Ludwigia uruguayensis Yes
Water primrose Ludwigia grandiflora Yes Yes
Waterweeds All species of the genus Elodea Yes
Whitetop weed Parthenium hysterophorus Yes
Yellow Azalea Rhododendron luteum Yes

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