Amur Corktree – Phellodendron amurense Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Amur Corktree under “Prohibited.”
Wisconsin invasive plants
Wisconsin (WI) regulates 141 invasive plants under Wis. Admin. Code NR 40.04. Wisconsin's list is a trade restriction, which governs what may be sold, propagated, or moved within the state — in plain terms, which plants are illegal to sell here.
Wisconsin invasive species list
Wisconsin restricts 141 plants, including Waterthyme, Amur Honeysuckle and Common Reed. Plants marked Prohibited may not be sold, propagated, or moved within Wisconsin. 111 of the 141 are also flagged invasive by GRIIS, which is an ecological finding rather than a ruling by Wisconsin. Checked against Wis. Admin. Code NR 40.04 on July 20, 2026.
Amur Honeysuckle – Lonicera maackii IntroducedInvasive
Invasive in the US, and recorded in 8 of Wisconsin’s 72 counties. Wisconsin lists Amur Honeysuckle under “Prohibited.”
Anchored Water Hyacinth – Eichhornia azurea Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Anchored Water Hyacinth under “Prohibited.”
Arrowhead – Sagittaria sagittifolia Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Arrowhead under “Prohibited.”
Asian Marshweed – Limnophila sessiliflora Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Asian Marshweed under “Prohibited.”
Asiatic Tearthumb – Polygonum perfoliatum Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Asiatic Tearthumb under “Prohibited.”
Basketgrass – Oplismenus hirtellus Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Basketgrass under “Prohibited.”
Blueberry Creeper – Ampelopsis brevipedunculata Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Blueberry Creeper under “Prohibited.”
Bohemian Knotweed – Polygonum x bohemicum Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Bohemian Knotweed under “Prohibited.”
Brazilian Waterweed – Egeria densa Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Brazilian Waterweed under “Prohibited.”
Brittle Waternymph – Najas minor Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Brittle Waternymph under “Prohibited.”
Broadleaved Pepperweed – Lepidium latifolium Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Broadleaved Pepperweed under “Prohibited.”
Carolina Fanwort – Cabomba caroliniana Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Carolina Fanwort under “Prohibited.”
Chinese Wisteria – Wisteria sinensis Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Chinese Wisteria under “Prohibited.”
Chinese Yam – Dioscorea oppositifolia Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Chinese Yam under “Prohibited.”
Codlins and Cream – Epilobium hirsutum IntroducedInvasive
Invasive in the US, and recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Codlins and Cream under “Prohibited.”
Coltsfoot – Tussilago farfara IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Coltsfoot under “Prohibited.”
Common Barberry – Berberis vulgaris IntroducedInvasive
Invasive in the US, and recorded in 15 of Wisconsin’s 72 counties. Wisconsin lists Common Barberry under “Prohibited.”
Common Frogbit – Hydrocharis morsus-ranae Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Common Frogbit under “Prohibited.”
Common Reed – Phragmites australis NativeProhibited
Recorded in 51 of Wisconsin’s 72 counties. Wisconsin lists Common Reed under “Prohibited.”
Common Water Hyacinth – Eichhornia crassipes Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Common Water Hyacinth under “Prohibited.”
Dalmatian Toadflax – Linaria dalmatica IntroducedInvasive
Invasive in the US, and recorded in 8 of Wisconsin’s 72 counties. Wisconsin lists Dalmatian Toadflax under “Prohibited.”
Diffuse Knapweed – Centaurea diffusa IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Diffuse Knapweed under “Prohibited.”
Ducklettuce – Ottelia alismoides Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Ducklettuce under “Prohibited.”
Empress Tree – Paulownia tomentosa Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Empress Tree under “Prohibited.”
Erect Hedgeparsley – Torilis japonica IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Erect Hedgeparsley under “Prohibited.”
European Swallow-Wort – Cynanchum rossicum Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists European Swallow-Wort under “Prohibited.”
European Wand Loosestrife – Lythrum virgatum Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists European Wand Loosestrife under “Prohibited.”
Feathered Mosquitofern – Azolla pinnata Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Feathered Mosquitofern under “Prohibited.”
Fig Buttercup – Ranunculus ficaria IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Fig Buttercup under “Prohibited.”
Fiveleaf Akebia – Akebia quinata Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Fiveleaf Akebia under “Prohibited.”
Floating Marshpennywort – Hydrocotyle ranunculoides Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Floating Marshpennywort under “Prohibited.”
Giant Hogweed – Heracleum mantegazzianum Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Giant Hogweed under “Prohibited.”
Giant Knotweed – Polygonum sachalinense IntroducedInvasive
Invasive in the US, and recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Giant Knotweed under “Prohibited.”
Giant Reed – Arundo donax Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Giant Reed under “Prohibited.”
Giant Salvinia – Salvinia herzogii Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Giant Salvinia under “Prohibited.”
Hardheads – Acroptilon repens IntroducedInvasive
Invasive in the US, and recorded in 2 of Wisconsin’s 72 counties. Wisconsin lists Hardheads under “Prohibited.”
Himalayan Blackberry – Rubus armeniacus Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Himalayan Blackberry under “Prohibited.”
Indian Swampweed – Hygrophila polysperma Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Indian Swampweed under “Prohibited.”
Japanese Chaff Flower – Achyranthes japonica Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Japanese Chaff Flower under “Prohibited.”
Japanese Hop – Humulus japonicus IntroducedInvasive
Invasive in the US, and recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Japanese Hop under “Prohibited.”
Japanese Wisteria – Wisteria floribunda Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Japanese Wisteria under “Prohibited.”
Java Waterdropwort – Oenanthe javanica Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Java Waterdropwort under “Prohibited.”
Johnsongrass – Sorghum halepense IntroducedInvasive
Invasive in the US, and recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Johnsongrass under “Prohibited.”
Kariba-Weed – Salvinia molesta Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Kariba-Weed under “Prohibited.”
Kudzu – Pueraria montana Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Kudzu under “Prohibited.”
Louise's Swallow-Wort – Cynanchum louiseae IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Louise's Swallow-Wort under “Prohibited.”
Marsh Thistle – Cirsium palustre IntroducedInvasive
Invasive in the US, and recorded in 7 of Wisconsin’s 72 counties. Wisconsin lists Marsh Thistle under “Prohibited.”
Medusahead – Taeniatherum caput-medusae Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Medusahead under “Prohibited.”
Mudmats – Glossostigma cleistanthum Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Mudmats under “Prohibited.”
Narrowleaf Bittercress – Cardamine impatiens Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Narrowleaf Bittercress under “Prohibited.”
Nepalese Browntop – Microstegium vimineum Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Nepalese Browntop under “Prohibited.”
Ornamental Jewelweed – Impatiens glandulifera Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Ornamental Jewelweed under “Prohibited.”
Oxygen-Weed – Lagarosiphon major Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Oxygen-Weed under “Prohibited.”
Parrot Feather Watermilfoil – Myriophyllum aquaticum Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Parrot Feather Watermilfoil under “Prohibited.”
Pestilence Wort – Petasites hybridus Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Pestilence Wort under “Prohibited.”
Poison Hemlock – Conium maculatum IntroducedInvasive
Invasive in the US, and recorded in 6 of Wisconsin’s 72 counties. Wisconsin lists Poison Hemlock under “Prohibited.”
Purple-Leaf Japanese Honeysuckle – Lonicera japonica 'Purpurea' Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Purple-Leaf Japanese Honeysuckle under “Prohibited.”
Sacred Lotus – Nelumbo nucifera Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Sacred Lotus under “Prohibited.”
Sand Ryegrass – Leymus arenarius IntroducedProhibited
Recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Sand Ryegrass under “Prohibited.”
Sawtooth Oak – Quercus acutissima Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Sawtooth Oak under “Prohibited.”
Scotch Broom – Cytisus scoparius Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Scotch Broom under “Prohibited.”
Seaside Goldenrod – Solidago sempervirens Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Seaside Goldenrod under “Prohibited.”
Sericea Lespedeza – Lespedeza cuneata IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Sericea Lespedeza under “Prohibited.”
Southern Cattail – Typha domingensis Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Southern Cattail under “Prohibited.”
Spreading Hedgeparsley – Torilis arvensis Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Spreading Hedgeparsley under “Prohibited.”
Swamp Morning-Glory – Ipomoea aquatica Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Swamp Morning-Glory under “Prohibited.”
Swamp Stonecrop – Crassula helmsii Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Swamp Stonecrop under “Prohibited.”
Turkish Wartycabbage – Bunias orientalis IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Turkish Wartycabbage under “Prohibited.”
Variegated Water Grass – Glyceria maxima 'Variegata' IntroducedInvasive
Invasive in the US, and recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Variegated Water Grass under “Prohibited.”
Water Chestnut – Trapa natans Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Water Chestnut under “Prohibited.”
Water Lettuce – Pistia stratiotes Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Water Lettuce under “Prohibited.”
Water Soldiers – Stratiotes aloides Not recorded hereProhibited
Recorded in no Wisconsin county. Wisconsin lists Water Soldiers under “Prohibited.”
Waterthyme – Hydrilla verticillata Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Waterthyme under “Prohibited.”
Wild Chervil – Anthriscus sylvestris IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Wild Chervil under “Prohibited.”
Wine Raspberry – Rubus phoenicolasius Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Wine Raspberry under “Prohibited.”
Woolly Foxglove – Digitalis lanata IntroducedProhibited
Recorded in 2 of Wisconsin’s 72 counties. Wisconsin lists Woolly Foxglove under “Prohibited.”
Yellow Floatingheart – Nymphoides peltata Not recorded hereInvasive
Invasive in the US, and recorded in no Wisconsin county. Wisconsin lists Yellow Floatingheart under “Prohibited.”
Yellow Star-Thistle – Centaurea solstitialis IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Yellow Star-Thistle under “Prohibited.”
Absinthium – Artemisia absinthium IntroducedInvasive
Invasive in the US, and recorded in 25 of Wisconsin’s 72 counties. Wisconsin lists Absinthium under “Restricted.”
Autumn Olive – Elaeagnus umbellata IntroducedInvasive
Invasive in the US, and recorded in 12 of Wisconsin’s 72 counties. Wisconsin lists Autumn Olive under “Restricted.”
Balfour's Touch-Me-Not – Impatiens balfourii IntroducedInvasive
Invasive in the US, and recorded in 1 of Wisconsin’s 72 counties. Wisconsin lists Balfour's Touch-Me-Not under “Restricted.”
Bishop's Goutweed – Aegopodium podagraria IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Bishop's Goutweed under “Restricted.”
Black Alder – Alnus glutinosa IntroducedInvasive
Invasive in the US, and recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Black Alder under “Restricted.”
Black Locust – Robinia pseudoacacia NativeRestricted
Recorded in 46 of Wisconsin’s 72 counties. Wisconsin lists Black Locust under “Restricted.”
Bolleana Poplar – Populus alba 'Pyramidalis' IntroducedInvasive
Invasive in the US, and recorded in 22 of Wisconsin’s 72 counties. Wisconsin lists Bolleana Poplar under “Restricted.”
Bristly Locust – Robinia hispida NativeRestricted
Recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Bristly Locust under “Restricted.”
Brittlestem Hempnettle – Galeopsis tetrahit IntroducedInvasive
Invasive in the US, and recorded in 37 of Wisconsin’s 72 counties. Wisconsin lists Brittlestem Hempnettle under “Restricted.”
Broadleaf Helleborine – Epipactis helleborine IntroducedInvasive
Invasive in the US, and recorded in 12 of Wisconsin’s 72 counties. Wisconsin lists Broadleaf Helleborine under “Restricted.”
Brownray Knapweed – Centaurea jacea IntroducedInvasive
Invasive in the US, and recorded in 11 of Wisconsin’s 72 counties. Wisconsin lists Brownray Knapweed under “Restricted.”
Burning Bush – Euonymus alatus IntroducedInvasive
Invasive in the US, and recorded in 8 of Wisconsin’s 72 counties. Wisconsin lists Burning Bush under “Restricted.”
Canada Thistle – Cirsium arvense IntroducedInvasive
Invasive in the US, and recorded in 59 of Wisconsin’s 72 counties. Wisconsin lists Canada Thistle under “Restricted.”
Celandine – Chelidonium majus IntroducedInvasive
Invasive in the US, and recorded in 14 of Wisconsin’s 72 counties. Wisconsin lists Celandine under “Restricted.”
Common Buckthorn – Rhamnus cathartica IntroducedInvasive
Invasive in the US, and recorded in 29 of Wisconsin’s 72 counties. Wisconsin lists Common Buckthorn under “Restricted.”
Crownvetch – Securigera varia IntroducedInvasive
Invasive in the US, and recorded in 34 of Wisconsin’s 72 counties. Wisconsin lists Crownvetch under “Restricted.”
Curly Pondweed – Potamogeton crispus IntroducedInvasive
Invasive in the US, and recorded in 43 of Wisconsin’s 72 counties. Wisconsin lists Curly Pondweed under “Restricted.”
Cutleaf Teasel – Dipsacus laciniatus IntroducedInvasive
Invasive in the US, and recorded in 7 of Wisconsin’s 72 counties. Wisconsin lists Cutleaf Teasel under “Restricted.”
Cypress Spurge – Euphorbia cyparissias IntroducedInvasive
Invasive in the US, and recorded in 43 of Wisconsin’s 72 counties. Wisconsin lists Cypress Spurge under “Restricted.”
Dames Rocket – Hesperis matronalis IntroducedInvasive
Invasive in the US, and recorded in 25 of Wisconsin’s 72 counties. Wisconsin lists Dames Rocket under “Restricted.”
Eurasian Watermilfoil – Myriophyllum spicatum IntroducedInvasive
Invasive in the US, and recorded in 36 of Wisconsin’s 72 counties. Wisconsin lists Eurasian Watermilfoil under “Restricted.”
False Baby's Breath – Galium mollugo IntroducedInvasive
Invasive in the US, and recorded in 11 of Wisconsin’s 72 counties. Wisconsin lists False Baby's Breath under “Restricted.”
Field Scabiosa – Knautia arvensis IntroducedRestricted
Recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Field Scabiosa under “Restricted.”
Flowering Rush – Butomus umbellatus IntroducedInvasive
Invasive in the US, and recorded in 6 of Wisconsin’s 72 counties. Wisconsin lists Flowering Rush under “Restricted.”
Forget-Me-Not – Myosotis scorpioides IntroducedInvasive
Invasive in the US, and recorded in 48 of Wisconsin’s 72 counties. Wisconsin lists Forget-Me-Not under “Restricted.”
Fuller's Teasel – Dipsacus fullonum IntroducedRestricted
Recorded in 7 of Wisconsin’s 72 counties. Wisconsin lists Fuller's Teasel under “Restricted.”
Garden Valerian – Valeriana officinalis IntroducedInvasive
Invasive in the US, and recorded in 13 of Wisconsin’s 72 counties. Wisconsin lists Garden Valerian under “Restricted.”
Garden Yellow Loosestrife – Lysimachia vulgaris IntroducedInvasive
Invasive in the US, and recorded in 6 of Wisconsin’s 72 counties. Wisconsin lists Garden Yellow Loosestrife under “Restricted.”
Garlic Mustard – Alliaria petiolata IntroducedInvasive
Invasive in the US, and recorded in 26 of Wisconsin’s 72 counties. Wisconsin lists Garlic Mustard under “Restricted.”
Glossy Buckthorn – Frangula alnus IntroducedInvasive
Invasive in the US, and recorded in 30 of Wisconsin’s 72 counties. Wisconsin lists Glossy Buckthorn under “Restricted.”
Gypsyflower – Cynoglossum officinale IntroducedInvasive
Invasive in the US, and recorded in 38 of Wisconsin’s 72 counties. Wisconsin lists Gypsyflower under “Restricted.”
Hybrid Cattail – Typha x glauca NativeRestricted
Recorded in 23 of Wisconsin’s 72 counties. Wisconsin lists Hybrid Cattail under “Restricted.”
Japanese Barberry – Berberis thunbergii IntroducedInvasive
Invasive in the US, and recorded in 31 of Wisconsin’s 72 counties. Wisconsin lists Japanese Barberry under “Restricted.”
Japanese Knotweed – Fallopia japonica (potentially invasive weed) IntroducedInvasive
Invasive in the US, and recorded in 21 of Wisconsin’s 72 counties. Wisconsin lists Japanese Knotweed under “Restricted.”
Leafy Spurge – Euphorbia esula IntroducedInvasive
Invasive in the US, and recorded in 31 of Wisconsin’s 72 counties. Wisconsin lists Leafy Spurge under “Restricted.”
Lesser Knapweed – Centaurea nigra IntroducedInvasive
Invasive in the US, and recorded in 2 of Wisconsin’s 72 counties. Wisconsin lists Lesser Knapweed under “Restricted.”
Morrow's Honeysuckle – Lonicera morrowii IntroducedInvasive
Invasive in the US, and recorded in 31 of Wisconsin’s 72 counties. Wisconsin lists Morrow's Honeysuckle under “Restricted.”
Multiflora Rose – Rosa multiflora IntroducedInvasive
Invasive in the US, and recorded in 21 of Wisconsin’s 72 counties. Wisconsin lists Multiflora Rose under “Restricted.”
Narrowleaf Cattail – Typha angustifolia NativeInvasive
Invasive in the US, and recorded in 29 of Wisconsin’s 72 counties. Wisconsin lists Narrowleaf Cattail under “Restricted.”
Nodding Plumeless Thistle – Carduus nutans IntroducedInvasive
Invasive in the US, and recorded in 17 of Wisconsin’s 72 counties. Wisconsin lists Nodding Plumeless Thistle under “Restricted.”
Oriental Bittersweet – Celastrus orbiculatus IntroducedInvasive
Invasive in the US, and recorded in 2 of Wisconsin’s 72 counties. Wisconsin lists Oriental Bittersweet under “Restricted.”
Paleyellow Iris – Iris pseudacorus IntroducedInvasive
Invasive in the US, and recorded in 11 of Wisconsin’s 72 counties. Wisconsin lists Paleyellow Iris under “Restricted.”
Parsnip – Pastinaca sativa IntroducedInvasive
Invasive in the US, and recorded in 43 of Wisconsin’s 72 counties. Wisconsin lists Parsnip under “Restricted.”
Purple Loosestrife – Lythrum salicaria IntroducedInvasive
Invasive in the US, and recorded in 40 of Wisconsin’s 72 counties. Wisconsin lists Purple Loosestrife under “Restricted.”
Queen of the Meadow – Filipendula ulmaria IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Queen of the Meadow under “Restricted.”
Rampion Bellflower – Campanula rapunculoides IntroducedInvasive
Invasive in the US, and recorded in 56 of Wisconsin’s 72 counties. Wisconsin lists Rampion Bellflower under “Restricted.”
Reed Canarygrass – Phalaris arundinacea NativeRestricted
Recorded in 69 of Wisconsin’s 72 counties. Wisconsin lists Reed Canarygrass under “Restricted.”
Russian Olive – Elaeagnus angustifolia IntroducedInvasive
Invasive in the US, and recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Russian Olive under “Restricted.”
Showy Fly Honeysuckle – Lonicera x bella IntroducedInvasive
Invasive in the US, and recorded in 16 of Wisconsin’s 72 counties. Wisconsin lists Showy Fly Honeysuckle under “Restricted.”
Siberian Elm – Ulmus pumila IntroducedInvasive
Invasive in the US, and recorded in 25 of Wisconsin’s 72 counties. Wisconsin lists Siberian Elm under “Restricted.”
Siberian Pea Shrub – Caragana arborescens IntroducedInvasive
Invasive in the US, and recorded in 8 of Wisconsin’s 72 counties. Wisconsin lists Siberian Pea Shrub under “Restricted.”
Solidstem Burnet Saxifrage – Pimpinella saxifraga IntroducedInvasive
Invasive in the US, and recorded in 3 of Wisconsin’s 72 counties. Wisconsin lists Solidstem Burnet Saxifrage under “Restricted.”
Spiny Naiad – Najas marina NativeRestricted
Recorded in 9 of Wisconsin’s 72 counties. Wisconsin lists Spiny Naiad under “Restricted.”
Spiny Plumeless Thistle – Carduus acanthoides IntroducedInvasive
Invasive in the US, and recorded in 16 of Wisconsin’s 72 counties. Wisconsin lists Spiny Plumeless Thistle under “Restricted.”
Spotted Knapweed – Centaurea stoebe IntroducedInvasive
Invasive in the US, and recorded in 47 of Wisconsin’s 72 counties. Wisconsin lists Spotted Knapweed under “Restricted.”
Tansy – Tanacetum vulgare IntroducedInvasive
Invasive in the US, and recorded in 11 of Wisconsin’s 72 counties. Wisconsin lists Tansy under “Restricted.”
Tatar Maple – Acer tataricum Not recorded hereRestricted
Recorded in no Wisconsin county. Wisconsin lists Tatar Maple under “Restricted.”
Tatarian Honeysuckle – Lonicera tatarica IntroducedInvasive
Invasive in the US, and recorded in 48 of Wisconsin’s 72 counties. Wisconsin lists Tatarian Honeysuckle under “Restricted.”
Tree of Heaven – Ailanthus altissima IntroducedInvasive
Invasive in the US, and recorded in 5 of Wisconsin’s 72 counties. Wisconsin lists Tree of Heaven under “Restricted.”
Tyrol Knapweed – Centaurea nigrescens IntroducedRestricted
Recorded in 4 of Wisconsin’s 72 counties. Wisconsin lists Tyrol Knapweed under “Restricted.”
White Mulberry – Morus alba IntroducedInvasive
Invasive in the US, and recorded in 31 of Wisconsin’s 72 counties. Wisconsin lists White Mulberry under “Restricted.”
Woodland Forget-Me-Not – Myosotis sylvatica IntroducedInvasive
Invasive in the US, and recorded in 7 of Wisconsin’s 72 counties. Wisconsin lists Woodland Forget-Me-Not under “Restricted.”
No plant on Wisconsin’s list matches that.
10 of these plants are native to part of the United States, marked US native above. Nativity is regional. Black locust is native to the Appalachians and regulated in New England; Palmer amaranth is native to the Southwest and listed as an agricultural weed in the Corn Belt. A listing tells you what Wisconsin regulates, not where a plant belongs. The county checker answers the second question.
Wisconsin sets a different status in some counties. 14 species carry a narrower status in 65 named counties. A state-wide table cannot show that, so use the county checker for an address-level answer.
Want to check a plant by photo or county?
Use our “Is it native” tool for free.Compiled from the rule itself, retrieved July 20, 2026. Law changes; if you spot a listing we have wrong or stale, tell us at support@getezina.com.
The same list as a table
| Plant | Scientific name | Status | Plant instead |
|---|---|---|---|
| Amur Corktree | Phellodendron amurense | ProhibitedInvasive | Western Catalpa, Kentucky Coffeetree, Eastern Black Walnut |
| Amur Honeysuckle | Lonicera maackii | ProhibitedInvasive | Common Witch Hazel, Smooth Sumac, Shining Willow |
| Anchored Water Hyacinth | Eichhornia azurea | ProhibitedInvasive | — |
| Arrowhead | Sagittaria sagittifolia | Prohibited | — |
| Asian Marshweed | Limnophila sessiliflora | ProhibitedInvasive | — |
| Asiatic Tearthumb | Polygonum perfoliatum | ProhibitedInvasive | — |
| Basketgrass | Oplismenus hirtellus | Prohibited | — |
| Blueberry Creeper | Ampelopsis brevipedunculata | Prohibited | Beach Pea, American Bittersweet, Summer Grape |
| Bohemian Knotweed | Polygonum x bohemicum | Prohibited | — |
| Brazilian Waterweed | Egeria densa | ProhibitedInvasive | — |
| Brittle Waternymph | Najas minor | ProhibitedInvasive | — |
| Broadleaved Pepperweed | Lepidium latifolium | ProhibitedInvasive | — |
| Carolina Fanwort US native | Cabomba caroliniana | Prohibited | — |
| Chinese Wisteria | Wisteria sinensis | ProhibitedInvasive | American Vetch, Low False Bindweed, Beach Pea |
| Chinese Yam | Dioscorea oppositifolia | ProhibitedInvasive | Riverbank Grape, Summer Grape, Devil's Darning Needles |
| Codlins and Cream | Epilobium hirsutum | ProhibitedInvasive | — |
| Coltsfoot | Tussilago farfara | ProhibitedInvasive | American Water Plantain, Marsh Marigold, Marsh Bellflower |
| Common Barberry | Berberis vulgaris | ProhibitedInvasive | Common Juniper, Sandcherry, Northern Black Currant |
| Common Frogbit | Hydrocharis morsus-ranae | ProhibitedInvasive | — |
| Common Reed | Phragmites australis | Prohibited | — |
| Common Water Hyacinth | Eichhornia crassipes | ProhibitedInvasive | — |
| Dalmatian Toadflax | Linaria dalmatica | ProhibitedInvasive | — |
| Diffuse Knapweed | Centaurea diffusa | ProhibitedInvasive | — |
| Ducklettuce | Ottelia alismoides | ProhibitedInvasive | — |
| Empress Tree | Paulownia tomentosa | ProhibitedInvasive | Paper Birch, Pin Cherry, Black Cherry |
| Erect Hedgeparsley | Torilis japonica | ProhibitedInvasive | — |
| European Swallow-Wort | Cynanchum rossicum | ProhibitedInvasive | — |
| European Wand Loosestrife | Lythrum virgatum | Prohibited | Great St. Johnswort, Canada Goldenrod, Cutleaf Waterparsnip |
| Feathered Mosquitofern | Azolla pinnata | ProhibitedInvasive | — |
| Fig Buttercup | Ranunculus ficaria | ProhibitedInvasive | Alkali Buttercup, Beach Pea, Blue Eyed Grass |
| Fiveleaf Akebia | Akebia quinata | ProhibitedInvasive | — |
| Floating Marshpennywort US native | Hydrocotyle ranunculoides | Prohibited | — |
| Giant Hogweed | Heracleum mantegazzianum | ProhibitedInvasive | — |
| Giant Knotweed | Polygonum sachalinense | ProhibitedInvasive | — |
| Giant Reed | Arundo donax | ProhibitedInvasive | — |
| Giant Salvinia | Salvinia herzogii | Prohibited | — |
| Hardheads | Acroptilon repens | ProhibitedInvasive | — |
| Himalayan Blackberry | Rubus armeniacus | Prohibited | — |
| Indian Swampweed | Hygrophila polysperma | ProhibitedInvasive | — |
| Japanese Chaff Flower | Achyranthes japonica | ProhibitedInvasive | — |
| Japanese Hop | Humulus japonicus | ProhibitedInvasive | — |
| Japanese Wisteria | Wisteria floribunda | ProhibitedInvasive | American Vetch, Low False Bindweed, Beach Pea |
| Java Waterdropwort | Oenanthe javanica | Prohibited | — |
| Johnsongrass | Sorghum halepense | ProhibitedInvasive | — |
| Kariba-Weed | Salvinia molesta | ProhibitedInvasive | — |
| Kudzu | Pueraria montana | ProhibitedInvasive | Riverbank Grape, Trumpet Vine, American Vetch |
| Louise's Swallow-Wort | Cynanchum louiseae | ProhibitedInvasive | — |
| Marsh Thistle | Cirsium palustre | ProhibitedInvasive | — |
| Medusahead | Taeniatherum caput-medusae | ProhibitedInvasive | — |
| Mudmats | Glossostigma cleistanthum | Prohibited | — |
| Narrowleaf Bittercress | Cardamine impatiens | ProhibitedInvasive | — |
| Nepalese Browntop | Microstegium vimineum | ProhibitedInvasive | — |
| Ornamental Jewelweed | Impatiens glandulifera | ProhibitedInvasive | — |
| Oxygen-Weed | Lagarosiphon major | Prohibited | — |
| Parrot Feather Watermilfoil | Myriophyllum aquaticum | ProhibitedInvasive | — |
| Pestilence Wort | Petasites hybridus | ProhibitedInvasive | — |
| Poison Hemlock | Conium maculatum | ProhibitedInvasive | — |
| Purple-Leaf Japanese Honeysuckle | Lonicera japonica 'Purpurea' | ProhibitedInvasive | Hairy Honeysuckle, Grape Honeysuckle, Trumpet Vine |
| Sacred Lotus | Nelumbo nucifera | ProhibitedInvasive | — |
| Sand Ryegrass | Leymus arenarius | Prohibited | — |
| Sawtooth Oak | Quercus acutissima | Prohibited | — |
| Scotch Broom | Cytisus scoparius | ProhibitedInvasive | American Black Currant, Sandcherry, Canadian Gooseberry |
| Seaside Goldenrod US native | Solidago sempervirens | Prohibited | — |
| Sericea Lespedeza | Lespedeza cuneata | ProhibitedInvasive | — |
| Southern Cattail US native | Typha domingensis | Prohibited | — |
| Spreading Hedgeparsley | Torilis arvensis | ProhibitedInvasive | — |
| Swamp Morning-Glory | Ipomoea aquatica | ProhibitedInvasive | — |
| Swamp Stonecrop | Crassula helmsii | Prohibited | — |
| Turkish Wartycabbage | Bunias orientalis | ProhibitedInvasive | — |
| Variegated Water Grass | Glyceria maxima 'Variegata' | ProhibitedInvasive | Rattlesnake Mannagrass, Small Floating Mannagrass, American Mannagrass |
| Water Chestnut | Trapa natans | ProhibitedInvasive | — |
| Water Lettuce US native | Pistia stratiotes | Prohibited | — |
| Water Soldiers | Stratiotes aloides | Prohibited | — |
| Waterthyme | Hydrilla verticillata | ProhibitedInvasive | — |
| Wild Chervil | Anthriscus sylvestris | ProhibitedInvasive | — |
| Wine Raspberry | Rubus phoenicolasius | ProhibitedInvasive | Northern Black Currant, Russet Buffaloberry, Western Snowberry |
| Woolly Foxglove | Digitalis lanata | Prohibited | — |
| Yellow Floatingheart | Nymphoides peltata | ProhibitedInvasive | — |
| Yellow Star-Thistle | Centaurea solstitialis | ProhibitedInvasive | — |
| Absinthium | Artemisia absinthium | RestrictedInvasive | — |
| Autumn Olive | Elaeagnus umbellata | RestrictedInvasive | Smooth Sumac, American Black Elderberry, Common Juniper |
| Balfour's Touch-Me-Not | Impatiens balfourii | RestrictedInvasive | — |
| Bishop's Goutweed | Aegopodium podagraria | RestrictedInvasive | Pipsissewa, June Grass, Greater Creeping Spearwort |
| Black Alder | Alnus glutinosa | RestrictedInvasive | River/Red Birch, Balsam Poplar, Pin Oak |
| Black Locust US native | Robinia pseudoacacia | Restricted | — |
| Bolleana Poplar | Populus alba 'Pyramidalis' | RestrictedInvasive | Bigtooth Aspen, Quaking Aspen, Balsam Poplar |
| Bristly Locust US native | Robinia hispida | Restricted | — |
| Brittlestem Hempnettle | Galeopsis tetrahit | RestrictedInvasive | — |
| Broadleaf Helleborine | Epipactis helleborine | RestrictedInvasive | — |
| Brownray Knapweed | Centaurea jacea | RestrictedInvasive | — |
| Burning Bush | Euonymus alatus | RestrictedInvasive | Russet Buffaloberry, Mapleleaf Viburnum, Steeplebush |
| Canada Thistle | Cirsium arvense | RestrictedInvasive | — |
| Celandine | Chelidonium majus | RestrictedInvasive | — |
| Common Buckthorn | Rhamnus cathartica | RestrictedInvasive | Common Witch Hazel, Smooth Sumac, Shining Willow |
| Crownvetch | Securigera varia | RestrictedInvasive | — |
| Curly Pondweed | Potamogeton crispus | RestrictedInvasive | — |
| Cutleaf Teasel | Dipsacus laciniatus | RestrictedInvasive | — |
| Cypress Spurge | Euphorbia cyparissias | RestrictedInvasive | Purple Love Grass, Pale Purple Coneflower, Woolly Beachheather |
| Dames Rocket | Hesperis matronalis | RestrictedInvasive | Woolly Yarrow, Drummond's Rockcress, Rough Avens |
| Eurasian Watermilfoil | Myriophyllum spicatum | RestrictedInvasive | — |
| False Baby's Breath | Galium mollugo | RestrictedInvasive | — |
| Field Scabiosa | Knautia arvensis | Restricted | — |
| Flowering Rush | Butomus umbellatus | RestrictedInvasive | — |
| Forget-Me-Not | Myosotis scorpioides | RestrictedInvasive | — |
| Fuller's Teasel | Dipsacus fullonum | Restricted | — |
| Garden Valerian | Valeriana officinalis | RestrictedInvasive | Maryland Senna, Harvestlice, Gay Feather |
| Garden Yellow Loosestrife | Lysimachia vulgaris | RestrictedInvasive | — |
| Garlic Mustard | Alliaria petiolata | RestrictedInvasive | — |
| Glossy Buckthorn | Frangula alnus | RestrictedInvasive | Shining Willow, Speckled Alder, Silky Willow |
| Gypsyflower | Cynoglossum officinale | RestrictedInvasive | — |
| Hybrid Cattail US native | Typha x glauca | Restricted | — |
| Japanese Barberry | Berberis thunbergii | RestrictedInvasive | White Meadowsweet, Sweetgale, Sandcherry |
| Japanese Knotweed | Fallopia japonica (potentially invasive weed) | RestrictedInvasive | — |
| Leafy Spurge | Euphorbia esula | RestrictedInvasive | — |
| Lesser Knapweed | Centaurea nigra | RestrictedInvasive | — |
| Morrow's Honeysuckle | Lonicera morrowii | RestrictedInvasive | White Meadowsweet, Sandcherry, American Black Currant |
| Multiflora Rose | Rosa multiflora | RestrictedInvasive | American Black Currant, White Meadowsweet, American Fly Honeysuckle |
| Narrowleaf Cattail | Typha angustifolia | RestrictedInvasive | — |
| Nodding Plumeless Thistle | Carduus nutans | RestrictedInvasive | — |
| Oriental Bittersweet | Celastrus orbiculatus | RestrictedInvasive | American Bittersweet, Summer Grape, Trumpet Vine |
| Paleyellow Iris | Iris pseudacorus | RestrictedInvasive | Harlequin Blueflag, Virginia Iris, Pickerelweed |
| Parsnip | Pastinaca sativa | RestrictedInvasive | — |
| Purple Loosestrife | Lythrum salicaria | RestrictedInvasive | Great St. Johnswort, Canada Goldenrod, Cutleaf Waterparsnip |
| Queen of the Meadow | Filipendula ulmaria | RestrictedInvasive | — |
| Rampion Bellflower | Campanula rapunculoides | RestrictedInvasive | — |
| Reed Canarygrass US native | Phalaris arundinacea | Restricted | Common Rush, Sweet Woodreed, Drooping Woodreed |
| Russian Olive | Elaeagnus angustifolia | RestrictedInvasive | Silver Buffaloberry, Smooth Sumac, American Black Elderberry |
| Showy Fly Honeysuckle | Lonicera x bella | RestrictedInvasive | White Meadowsweet, Sandcherry, American Black Currant |
| Siberian Elm | Ulmus pumila | RestrictedInvasive | Rock Elm, Western Catalpa, Kentucky Coffeetree |
| Siberian Pea Shrub | Caragana arborescens | RestrictedInvasive | — |
| Solidstem Burnet Saxifrage | Pimpinella saxifraga | RestrictedInvasive | — |
| Spiny Naiad US native | Najas marina | Restricted | — |
| Spiny Plumeless Thistle | Carduus acanthoides | RestrictedInvasive | — |
| Spotted Knapweed | Centaurea stoebe | RestrictedInvasive | — |
| Tansy | Tanacetum vulgare | RestrictedInvasive | — |
| Tatar Maple | Acer tataricum | Restricted | — |
| Tatarian Honeysuckle | Lonicera tatarica | RestrictedInvasive | American Fly Honeysuckle, Swamp Fly Honeysuckle, American Black Currant |
| Tree of Heaven | Ailanthus altissima | RestrictedInvasive | Western Catalpa, Kentucky Coffeetree, Black Cherry |
| Tyrol Knapweed | Centaurea nigrescens | Restricted | — |
| White Mulberry | Morus alba | RestrictedInvasive | Red Mulberry, Osage-Orange, Scarlet Oak |
| Woodland Forget-Me-Not | Myosotis sylvatica | RestrictedInvasive | — |
Where this comes from
- Wisconsin listings
- Wis. Admin. Code NR 40.04. Read the rule.
- Invasive status
- GRIIS, the Global Register of Introduced and Invasive Species, via GBIF, covering the lower 48 states. A scientific register with no legal force; it is cited separately from the statute above because the two disagree far more often than they agree. Garden crops it flags only for spreading from cultivation are left out after review.
- Status wording
- The Prohibited / Restricted / Listed chips are Ezina’s normalisation across 44 states and are not the legal term. Where Wisconsin’s own word for a plant differs from the chip, it is quoted verbatim beneath it.
- Nativity
- USDA PLANTS county distribution layer, surfaced through the county checker.
Regulated next door, but not in Wisconsin
Plants that two or more states bordering Wisconsin regulate, and Wisconsin does not. A listing is a legal act rather than an ecological one, so a plant can be a documented problem here and still be sold here.
- Callery Pear Pyrus calleryana regulated in Illinois, Michigan, Minnesota
Questions
Is there an official Wisconsin invasive species list?
Yes. Wis. Admin. Code NR 40.04 is Wisconsin's list, naming 141 plants under a trade restriction, which governs what may be sold, propagated, or moved within the state — in plain terms, which plants are illegal to sell here. GRIIS, the Global Register of Introduced and Invasive Species, flags 111 of these 141 as invasive in the lower 48 states. That is an ecological finding, not a ruling by Wisconsin. This page shows both side by side.
What plants are illegal to sell in Wisconsin?
141 plants are regulated under Wis. Admin. Code NR 40.04. Plants marked Prohibited may not be sold, propagated, or moved within Wisconsin. Plants marked Restricted carry narrower limits set by the rule.
Is my plant invasive in Wisconsin?
Search the table on this page for Wisconsin's legal determination, then look for the Invasive chip beside it, which is a separate ecological finding from GRIIS rather than a ruling by Wisconsin. A plant can carry one, both, or neither. For an address-level answer, enter the plant's name in Ezina's checker to get its Wisconsin status alongside whether USDA records it as native to your specific county. Every answer links the record it came from.
Is it illegal to plant these in Wisconsin?
For the plants marked Prohibited, Wis. Admin. Code NR 40.04 bars selling, propagating, or moving them within Wisconsin. Whether planting one you already own is itself an offence depends on that rule's exact wording, which is why every plant on this page links the citation rather than us paraphrasing it. Plants marked Restricted carry narrower limits the rule sets out.
Does a plant missing from this list mean it is safe to plant in Wisconsin?
No. This page reproduces what Wisconsin regulates, and a state list is a legal instrument rather than an ecological verdict. Plenty of plants spread aggressively without ever being listed, and states add species years after the problem is documented.
Grow natives easily with Ezina
How it works
We provide the tools you need to succeed.
010.1Identify
Add a plant
Snap a photo or type the name. Ezina matches it to a library of about 40,000 species and starts a care plan tailored to your zone, the local weather, and the time of year.
010.2Care
Get a care plan
A schedule built from local rain, temperature, and sun, not a fixed weekly cadence. You get a single notification when a plant actually needs water. Easily add treatments for diseases and pests.
010.3Plan
Explore new options
Our garden planner Dig helps you understand what works best for your location and makes suggestions based off your long term goals.
Add a plant
Snap a photo or type the name. Ezina matches it to a library of about 40,000 species and starts a care plan tailored to your zone, the local weather, and the time of year.
Get a care plan
A schedule built from local rain, temperature, and sun, not a fixed weekly cadence. You get a single notification when a plant actually needs water. Easily add treatments for diseases and pests.
Explore new options
Our garden planner Dig helps you understand what works best for your location and makes suggestions based off your long term goals.
Compiled from peer-reviewed research, USDA documentation,
and direct scientific observation across the United States.