Black Henbane – Hyoscyamus niger IntroducedInvasive
Invasive in the US, and recorded in 32 of Idaho’s 44 counties. Idaho lists Black Henbane under “Containment.”
Idaho (ID) lists 66 plants as noxious weeds under IDAPA 02.06.09.220. Idaho's list is an agricultural noxious-weed law, which governs control and spread on farmland and rights of way rather than what a nursery may sell.
Idaho names 66 plants, including Purple Loosestrife, Canada Thistle and Leafy Spurge. A noxious-weed listing obliges control and limits movement; it does not by itself ban nursery sale. 56 of the 66 are also flagged invasive by GRIIS, which is an ecological finding rather than a ruling by Idaho. Checked against IDAPA 02.06.09.220 on July 20, 2026.
Invasive in the US, and recorded in 32 of Idaho’s 44 counties. Idaho lists Black Henbane under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Blood Grass under “EDRR.”
Recorded in no Idaho county. Idaho lists Bohemian Knotweed under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Brazilian Waterweed under “EDRR.”
Invasive in the US, and recorded in 29 of Idaho’s 44 counties. Idaho lists Broadleaved Pepperweed under “Control.”
Invasive in the US, and recorded in 41 of Idaho’s 44 counties. Idaho lists Butter and Eggs under “Control.”
Invasive in the US, and recorded in 44 of Idaho’s 44 counties. Idaho lists Canada Thistle under “Control.”
Recorded in no Idaho county. Idaho lists Carolina Fanwort under “EDRR.”
Invasive in the US, and recorded in 11 of Idaho’s 44 counties. Idaho lists Common Crupina under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Common Frogbit under “EDRR.”
Recorded in 12 of Idaho’s 44 counties. Idaho lists Common Reed under “Containment.”
Invasive in the US, and recorded in 9 of Idaho’s 44 counties. Idaho lists Common Viper's Bugloss under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Common Water Hyacinth under “EDRR.”
Invasive in the US, and recorded in 7 of Idaho’s 44 counties. Idaho lists Curly Pondweed under “Control.”
Invasive in the US, and recorded in 39 of Idaho’s 44 counties. Idaho lists Dalmatian Toadflax under “Control.”
Invasive in the US, and recorded in 40 of Idaho’s 44 counties. Idaho lists Diffuse Knapweed under “Control.”
Invasive in the US, and recorded in 28 of Idaho’s 44 counties. Idaho lists Dyer's Woad under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Eurasian Watermilfoil under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Feathered Mosquitofern under “EDRR.”
Invasive in the US, and recorded in 43 of Idaho’s 44 counties. Idaho lists Field Bindweed under “Control.”
Invasive in the US, and recorded in 33 of Idaho’s 44 counties. Idaho lists Field Sowthistle under “Containment.”
Invasive in the US, and recorded in 3 of Idaho’s 44 counties. Idaho lists Flowering Rush under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Giant Hogweed under “EDRR.”
Invasive in the US, and recorded in 5 of Idaho’s 44 counties. Idaho lists Giant Knotweed under “Containment.”
Invasive in the US, and recorded in 21 of Idaho’s 44 counties. Idaho lists Gypsyflower under “Control.”
Invasive in the US, and recorded in 42 of Idaho’s 44 counties. Idaho lists Hardheads under “Containment.”
Invasive in the US, and recorded in 12 of Idaho’s 44 counties. Idaho lists Hoary Alyssum under “Control.”
Recorded in no Idaho county. Idaho lists Iberian Knapweed under “EDRR.”
Recorded in 18 of Idaho’s 44 counties. Idaho lists Japanese Knotweed under “Containment.”
Invasive in the US, and recorded in 18 of Idaho’s 44 counties. Idaho lists Johnsongrass under “Containment.”
Invasive in the US, and recorded in 31 of Idaho’s 44 counties. Idaho lists Jointed Goatgrass under “Control.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Kariba-Weed under “EDRR.”
Invasive in the US, and recorded in 42 of Idaho’s 44 counties. Idaho lists Leafy Spurge under “Control.”
Invasive in the US, and recorded in 6 of Idaho’s 44 counties. Idaho lists Matgrass under “Containment.”
Invasive in the US, and recorded in 14 of Idaho’s 44 counties. Idaho lists Meadow Hawkweed under “Containment.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Meadow Knapweed under “Containment.”
Invasive in the US, and recorded in 5 of Idaho’s 44 counties. Idaho lists Mediterranean Sage under “Containment.”
Invasive in the US, and recorded in 40 of Idaho’s 44 counties. Idaho lists Nodding Plumeless Thistle under “Containment.”
Invasive in the US, and recorded in 18 of Idaho’s 44 counties. Idaho lists Orange Hawkweed under “Containment.”
Invasive in the US, and recorded in 1 of Idaho’s 44 counties. Idaho lists Ornamental Jewelweed under “EDRR.”
Invasive in the US, and recorded in 21 of Idaho’s 44 counties. Idaho lists Oxeye Daisy under “Control.”
Invasive in the US, and recorded in 3 of Idaho’s 44 counties. Idaho lists Parrot Feather Watermilfoil under “Containment.”
Invasive in the US, and recorded in 42 of Idaho’s 44 counties. Idaho lists Poison Hemlock under “Control.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Professor-Weed under “EDRR.”
Invasive in the US, and recorded in 34 of Idaho’s 44 counties. Idaho lists Puncturevine under “Control.”
Invasive in the US, and recorded in 29 of Idaho’s 44 counties. Idaho lists Purple Loosestrife under “Control.”
Recorded in 1 of Idaho’s 44 counties. Idaho lists Queen-Devil Hawkweed under “EDRR.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Red Star-Thistle under “EDRR.”
Invasive in the US, and recorded in 32 of Idaho’s 44 counties. Idaho lists Rush Skeletonweed under “Control.”
Invasive in the US, and recorded in 11 of Idaho’s 44 counties. Idaho lists Scotch Broom under “Containment.”
Invasive in the US, and recorded in 42 of Idaho’s 44 counties. Idaho lists Scotch Cottonthistle under “Control.”
Recorded in 5 of Idaho’s 44 counties. Idaho lists Small Bugloss under “Containment.”
Invasive in the US, and recorded in 7 of Idaho’s 44 counties. Idaho lists Spiny Plumeless Thistle under “Control.”
Invasive in the US, and recorded in 44 of Idaho’s 44 counties. Idaho lists Spotted Knapweed under “Control.”
Recorded in 9 of Idaho’s 44 counties. Idaho lists Spring Milletgrass under “Control.”
Recorded in no Idaho county. Idaho lists Squarrose Knapweed under “EDRR.”
Invasive in the US, and recorded in 14 of Idaho’s 44 counties. Idaho lists Stinking Willie under “Control.”
Invasive in the US, and recorded in 5 of Idaho’s 44 counties. Idaho lists Syrian Beancaper under “EDRR.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Tall Hawkweed under “EDRR.”
Recorded in no Idaho county. Idaho lists Twoleaf Watermilfoil under “EDRR.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Water Chestnut under “EDRR.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Waterthyme under “EDRR.”
Invasive in the US, and recorded in 16 of Idaho’s 44 counties. Idaho lists White Bryony under “Control.”
Invasive in the US, and recorded in 41 of Idaho’s 44 counties. Idaho lists Whitetop under “Control.”
Invasive in the US, and recorded in no Idaho county. Idaho lists Yellow Floatingheart under “EDRR.”
Invasive in the US, and recorded in 29 of Idaho’s 44 counties. Idaho lists Yellow Star-Thistle under “Control.”
No plant on Idaho’s list matches that.
2 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 Idaho regulates, not where a plant belongs. The county checker answers the second question.
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.
| Plant | Scientific name | Status | Plant instead |
|---|---|---|---|
| Black Henbane | Hyoscyamus niger | ListedInvasiveIdaho says “Containment” | — |
| Blood Grass | Imperata cylindrica | ListedInvasiveIdaho says “EDRR” | Idaho Bentgrass, Douglas' Sedge, Threadleaf Sedge |
| Bohemian Knotweed | Polygonum x bohemicum | ListedIdaho says “Containment” | — |
| Brazilian Waterweed | Egeria densa | ListedInvasiveIdaho says “EDRR” | — |
| Broadleaved Pepperweed | Lepidium latifolium | ListedInvasiveIdaho says “Control” | — |
| Butter and Eggs | Linaria vulgaris | ListedInvasiveIdaho says “Control” | — |
| Canada Thistle | Cirsium arvense | ListedInvasiveIdaho says “Control” | — |
| Carolina Fanwort US native | Cabomba caroliniana | ListedIdaho says “EDRR” | — |
| Common Crupina | Crupina vulgaris | ListedInvasiveIdaho says “Containment” | — |
| Common Frogbit | Hydrocharis morsus-ranae | ListedInvasiveIdaho says “EDRR” | — |
| Common Reed | Phragmites australis | ListedIdaho says “Containment” | — |
| Common Viper's Bugloss | Echium vulgare | ListedInvasiveIdaho says “Containment” | — |
| Common Water Hyacinth | Eichhornia crassipes | ListedInvasiveIdaho says “EDRR” | — |
| Curly Pondweed | Potamogeton crispus | ListedInvasiveIdaho says “Control” | — |
| Dalmatian Toadflax | Linaria dalmatica | ListedInvasiveIdaho says “Control” | — |
| Diffuse Knapweed | Centaurea diffusa | ListedInvasiveIdaho says “Control” | — |
| Dyer's Woad | Isatis tinctoria | ListedInvasiveIdaho says “Containment” | — |
| Eurasian Watermilfoil | Myriophyllum spicatum | ListedInvasiveIdaho says “Containment” | — |
| Feathered Mosquitofern | Azolla pinnata | ListedInvasiveIdaho says “EDRR” | — |
| Field Bindweed | Convolvulus arvensis | ListedInvasiveIdaho says “Control” | — |
| Field Sowthistle | Sonchus arvensis | ListedInvasiveIdaho says “Containment” | — |
| Flowering Rush | Butomus umbellatus | ListedInvasiveIdaho says “Containment” | — |
| Giant Hogweed | Heracleum mantegazzianum | ListedInvasiveIdaho says “EDRR” | — |
| Giant Knotweed | Polygonum sachalinense | ListedInvasiveIdaho says “Containment” | — |
| Gypsyflower | Cynoglossum officinale | ListedInvasiveIdaho says “Control” | — |
| Hardheads | Acroptilon repens | ListedInvasiveIdaho says “Containment” | — |
| Hoary Alyssum | Berteroa incana | ListedInvasiveIdaho says “Control” | — |
| Iberian Knapweed | Centaurea iberica | ListedIdaho says “EDRR” | — |
| Japanese Knotweed | Polygonum cuspidatum | ListedIdaho says “Containment” | — |
| Johnsongrass | Sorghum halepense | ListedInvasiveIdaho says “Containment” | — |
| Jointed Goatgrass | Aegilops cylindrica | ListedInvasiveIdaho says “Control” | — |
| Kariba-Weed | Salvinia molesta | ListedInvasiveIdaho says “EDRR” | — |
| Leafy Spurge | Euphorbia esula | ListedInvasiveIdaho says “Control” | — |
| Matgrass | Nardus stricta | ListedInvasiveIdaho says “Containment” | — |
| Meadow Hawkweed | Hieracium caespitosum | ListedInvasiveIdaho says “Containment” | — |
| Meadow Knapweed | Centaurea debeauxii | ListedInvasiveIdaho says “Containment” | — |
| Mediterranean Sage | Salvia aethiopis | ListedInvasiveIdaho says “Containment” | — |
| Nodding Plumeless Thistle | Carduus nutans | ListedInvasiveIdaho says “Containment” | — |
| Orange Hawkweed | Hieracium aurantiacum | ListedInvasiveIdaho says “Containment” | — |
| Ornamental Jewelweed | Impatiens glandulifera | ListedInvasiveIdaho says “EDRR” | — |
| Oxeye Daisy | Leucanthemum vulgare | ListedInvasiveIdaho says “Control” | — |
| Parrot Feather Watermilfoil | Myriophyllum aquaticum | ListedInvasiveIdaho says “Containment” | — |
| Poison Hemlock | Conium maculatum | ListedInvasiveIdaho says “Control” | — |
| Professor-Weed | Galega officinalis | ListedInvasiveIdaho says “EDRR” | — |
| Puncturevine | Tribulus terrestris | ListedInvasiveIdaho says “Control” | — |
| Purple Loosestrife | Lythrum salicaria | ListedInvasiveIdaho says “Control” | Canada Goldenrod, Cutleaf Waterparsnip, Common Cowparsnip |
| Queen-Devil Hawkweed | Hieracium glomeratum | ListedIdaho says “EDRR” | — |
| Red Star-Thistle | Centaurea calcitrapa | ListedInvasiveIdaho says “EDRR” | — |
| Rush Skeletonweed | Chondrilla juncea | ListedInvasiveIdaho says “Control” | — |
| Scotch Broom | Cytisus scoparius | ListedInvasiveIdaho says “Containment” | Mallow Ninebark, Sticky Currant, Ninebark |
| Scotch Cottonthistle | Onopordum acanthium | ListedInvasiveIdaho says “Control” | — |
| Small Bugloss | Anchusa arvensis | ListedIdaho says “Containment” | — |
| Spiny Plumeless Thistle | Carduus acanthoides | ListedInvasiveIdaho says “Control” | — |
| Spotted Knapweed | Centaurea stoebe | ListedInvasiveIdaho says “Control” | — |
| Spring Milletgrass | Milium vernale | ListedIdaho says “Control” | — |
| Squarrose Knapweed | Centaurea virgata | ListedIdaho says “EDRR” | — |
| Stinking Willie | Senecio jacobaea | ListedInvasiveIdaho says “Control” | — |
| Syrian Beancaper | Zygophyllum fabago | ListedInvasiveIdaho says “EDRR” | — |
| Tall Hawkweed | Hieracium piloselloides | ListedInvasiveIdaho says “EDRR” | — |
| Twoleaf Watermilfoil US native | Myriophyllum heterophyllum | ListedIdaho says “EDRR” | — |
| Water Chestnut | Trapa natans | ListedInvasiveIdaho says “EDRR” | — |
| Waterthyme | Hydrilla verticillata | ListedInvasiveIdaho says “EDRR” | — |
| White Bryony | Bryonia alba | ListedInvasiveIdaho says “Control” | — |
| Whitetop | Cardaria draba | ListedInvasiveIdaho says “Control” | — |
| Yellow Floatingheart | Nymphoides peltata | ListedInvasiveIdaho says “EDRR” | — |
| Yellow Star-Thistle | Centaurea solstitialis | ListedInvasiveIdaho says “Control” | — |
Where this comes from
Plants that two or more states bordering Idaho regulate, and Idaho 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.
Not under that name. Idaho's legal list is a noxious-weed list: 66 plants named under IDAPA 02.06.09.220, an agricultural noxious-weed law, which governs control and spread on farmland and rights of way rather than what a nursery may sell. GRIIS, the Global Register of Introduced and Invasive Species, flags 56 of these 66 as invasive in the lower 48 states. That is an ecological finding, not a ruling by Idaho. This page shows both side by side.
Idaho's list is an agricultural noxious-weed law, which governs control and spread on farmland and rights of way rather than what a nursery may sell. 66 plants are named under IDAPA 02.06.09.220. A noxious-weed listing does not automatically ban nursery sale, so check the rule itself before assuming a plant cannot be bought or sold.
Search the table on this page for Idaho's legal determination, then look for the Invasive chip beside it, which is a separate ecological finding from GRIIS rather than a ruling by Idaho. 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 Idaho status alongside whether USDA records it as native to your specific county. Every answer links the record it came from.
Not necessarily, and the distinction matters. Idaho's list is an agricultural noxious-weed law: it obliges landowners to control these plants and restricts moving them, rather than making the act of planting one an offence in itself. IDAPA 02.06.09.220 is the text that says what is actually required of you, and it is linked beside every plant here.
No. This page reproduces what Idaho 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
We provide the tools you need to succeed.
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.
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.
Our garden planner Dig helps you understand what works best for your location and makes suggestions based off your long term goals.
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.
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.
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.
Thank you for signing up!
Confirmation is heading to your inbox now. If you don’t receive it in the next 15 minutes contact us at support@getezina.com