PlantLegitIdaho: invasive & noxious plant laws
New laws coming: several states phase in plant bans 2027–2030. See dates and sources →
Idaho's Rules Governing Invasive Species and Noxious Weeds, IDAPA 02.06.09 (Idaho State Department of Agriculture, under Idaho Code title 22 ch. 24), designate the statewide noxious weed lists. All plants in the broom genera Cytisus, Genista, Spartium and Chamaecytisus are prohibited. Landowners must control listed weeds, and the rule bars selling or furnishing any article containing noxious weed seeds or propagating parts, including nursery stock, unless treated to destroy viability. Idaho's invasive species rules separately regulate aquatic plants.
Official sources
- IDAPA 02.06.09 Rules Governing Invasive Species and Noxious Weeds (Idaho DFM, PDF)
- IDAPA 02.06.09.220 (LII)
- Invasive Species of Idaho — terrestrial plants
- Federal Noxious Weed List, 7 CFR § 360.200 (USDA APHIS) — applies in every state
Statewide Prohibited Genera — Idaho noxious weed (IDAPA 02.06.09.220) — articles carrying its seeds or parts, including nursery stock, may not be sold (§ 02.06.09.230) (4)
| Scientific name | Common name / notes |
|---|---|
| Cytisus spp. | brooms, all subtaxa |
| Genista spp. | brooms, all subtaxa |
| Spartium spp. | Spanish broom, all subtaxa |
| Chamaecytisus spp. | brooms, all subtaxa |
EDRR list — Idaho noxious weed (IDAPA 02.06.09.220) — articles carrying its seeds or parts, including nursery stock, may not be sold (§ 02.06.09.230); report within 10 days and eradicate (21)
| Scientific name | Common name / notes |
|---|---|
| Egeria densa | Brazilian elodea |
| Imperata cylindrica | cogongrass |
| Hydrocharis morsus-ranae | European frogbit |
| Cabomba caroliniana | fanwort |
| Azolla pinnata | feathered mosquito fern |
| Heracleum mantegazzianum | giant hogweed |
| Salvinia molesta | giant salvinia |
| Galega officinalis | goatsrue |
| Hydrilla verticillata | hydrilla |
| Centaurea iberica | Iberian starthistle |
| Impatiens glandulifera | policeman's helmet |
| Centaurea calcitrapa | purple starthistle |
| Centaurea triumfetti | squarrose knapweed |
| Nitellopsis obtusa | starry stonewort (an alga) |
| Zygophyllum fabago | Syrian beancaper |
| Hieracium piloselloides | tall hawkweed |
| Myriophyllum heterophyllum | variable-leaf milfoil |
| Trapa natans | water chestnut |
| Eichhornia crassipes | water hyacinth |
| Hieracium glomeratum | yellow devil hawkweed |
| Nymphoides peltata | yellow floating heart |
Statewide Control list — Idaho noxious weed (IDAPA 02.06.09.220) — articles carrying its seeds or parts, including nursery stock, may not be sold (§ 02.06.09.230) (23)
| Scientific name | Common name / notes |
|---|---|
| Hyoscyamus niger | black henbane |
| Polygonum ×bohemicum | Bohemian knotweed |
| Crupina vulgaris | common crupina |
| Phragmites australis | common reed (the rule does not separate the native subspecies) |
| Isatis tinctoria | dyer's woad |
| Myriophyllum spicatum | Eurasian watermilfoil and hybrids |
| Butomus umbellatus | flowering rush |
| Polygonum sachalinense | giant knotweed |
| Polygonum cuspidatum | Japanese knotweed |
| Sorghum halepense | Johnsongrass |
| Nardus stricta | matgrass |
| Centaurea debeauxii | meadow knapweed |
| Salvia aethiopis | Mediterranean sage |
| Carduus nutans | musk thistle |
| Hieracium aurantiacum | orange hawkweed |
| Myriophyllum aquaticum | parrotfeather |
| Sonchus arvensis | perennial sowthistle |
| Acroptilon repens | Russian knapweed |
| Cytisus scoparius | Scotch broom |
| Anchusa arvensis | small bugloss |
| Carduus cinereus | Turkish thistle |
| Echium vulgare | viper's bugloss |
| Hieracium caespitosum | yellow hawkweed |
Statewide Containment list — Idaho noxious weed (IDAPA 02.06.09.220) — articles carrying its seeds or parts, including nursery stock, may not be sold (§ 02.06.09.230) (26)
| Scientific name | Common name / notes |
|---|---|
| Cirsium arvense | Canada thistle |
| Potamogeton crispus | curlyleaf pondweed |
| Linaria dalmatica subsp. dalmatica | Dalmatian toadflax |
| Centaurea diffusa | diffuse knapweed |
| Convolvulus arvensis | field bindweed |
| Berteroa incana | hoary alyssum |
| Cynoglossum officinale | houndstongue |
| Aegilops cylindrica | jointed goatgrass |
| Euphorbia esula | leafy spurge |
| Milium vernale | milium |
| Leucanthemum vulgare | oxeye daisy |
| Lepidium latifolium | perennial pepperweed |
| Carduus acanthoides | plumeless thistle |
| Conium maculatum | poison hemlock |
| Tribulus terrestris | puncturevine |
| Lythrum salicaria | purple loosestrife |
| Chondrilla juncea | rush skeletonweed |
| Tamarix spp. | saltcedar |
| Onopordum acanthium | Scotch thistle |
| Centaurea stoebe | spotted knapweed |
| Senecio jacobaea | tansy ragwort |
| Bryonia alba | white bryony |
| Cardaria draba | whitetop, hoary cress |
| Iris pseudacorus | yellow flag iris |
| Centaurea solstitialis | yellow starthistle |
| Linaria vulgaris | yellow toadflax |
Check plants against Idaho law →
Informational only, not legal advice. Lists change; always check the official source linked above before you buy, sell, plant or move a plant. Lists checked 2026-10-14.