Blood Grass – Imperata cylindrica Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Blood Grass under “Class 4.”
Utah noxious weeds
Utah (UT) lists 52 plants as noxious weeds under Utah Admin. Code R68-9. Utah'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.
What plants are invasive in Utah?
Utah names 52 plants, including Russian Olive, Blood Grass and Scotch Broom. A noxious-weed listing obliges control and limits movement; it does not by itself ban nursery sale. 44 of the 52 are also flagged invasive by GRIIS, which is an ecological finding rather than a ruling by Utah. Checked against Utah Admin. Code R68-9 on July 20, 2026.
Creeping Spurge – Euphorbia myrsinites IntroducedProhibited
Recorded in 5 of Utah’s 29 counties. Utah lists Creeping Spurge under “Class 4.”
Dames Rocket – Hesperis matronalis IntroducedInvasive
Invasive in the US, and recorded in 4 of Utah’s 29 counties. Utah lists Dames Rocket under “Class 4.”
Russian Olive – Elaeagnus angustifolia IntroducedInvasive
Invasive in the US, and recorded in 29 of Utah’s 29 counties. Utah lists Russian Olive under “Class 4.”
Scotch Broom – Cytisus scoparius IntroducedInvasive
Invasive in the US, and recorded in 1 of Utah’s 29 counties. Utah lists Scotch Broom under “Class 4.”
Asian Mustard – Brassica tournefortii Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Asian Mustard under “Class 1B.”
Bermuda Grass – Cynodon dactylon IntroducedInvasive
Invasive in the US, and recorded in 6 of Utah’s 29 counties. Utah lists Bermuda Grass under “Class 3.”
Black Henbane – Hyoscyamus niger IntroducedInvasive
Invasive in the US, and recorded in 12 of Utah’s 29 counties. Utah lists Black Henbane under “Class 2.”
Broadleaved Pepperweed – Lepidium latifolium IntroducedInvasive
Invasive in the US, and recorded in 12 of Utah’s 29 counties. Utah lists Broadleaved Pepperweed under “Class 3.”
Butter and Eggs – Linaria vulgaris IntroducedInvasive
Invasive in the US, and recorded in 13 of Utah’s 29 counties. Utah lists Butter and Eggs under “Class 2.”
Camelthorn – Alhagi maurorum IntroducedInvasive
Invasive in the US, and recorded in 1 of Utah’s 29 counties. Utah lists Camelthorn under “Class 1B.”
Canada Thistle – Cirsium arvense IntroducedInvasive
Invasive in the US, and recorded in 29 of Utah’s 29 counties. Utah lists Canada Thistle under “Class 3.”
Columbus Grass – Sorghum almum Not recorded hereListed
Recorded in no Utah county. Utah lists Columbus Grass under “Class 3.”
Common Crupina – Crupina vulgaris Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Common Crupina under “Class 1A.”
Common Reed – Phragmites australis NativeListed
Recorded in 24 of Utah’s 29 counties. Utah lists Common Reed under “Class 3.”
Common St. Johnswort – Hypericum perforatum Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Common St. Johnswort under “Class 1B.”
Common Viper's Bugloss – Echium vulgare IntroducedInvasive
Invasive in the US, and recorded in 2 of Utah’s 29 counties. Utah lists Common Viper's Bugloss under “Class 1B.”
Cutleaf Vipergrass – Scorzonera laciniata Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Cutleaf Vipergrass under “Class 1B.”
Dalmatian Toadflax – Linaria dalmatica IntroducedInvasive
Invasive in the US, and recorded in 12 of Utah’s 29 counties. Utah lists Dalmatian Toadflax under “Class 2.”
Diffuse Knapweed – Centaurea diffusa IntroducedInvasive
Invasive in the US, and recorded in 4 of Utah’s 29 counties. Utah lists Diffuse Knapweed under “Class 2.”
Dyer's Woad – Isatis tinctoria IntroducedInvasive
Invasive in the US, and recorded in 15 of Utah’s 29 counties. Utah lists Dyer's Woad under “Class 2.”
Elongated Mustard – Brassica elongata Not recorded hereListed
Recorded in no Utah county. Utah lists Elongated Mustard under “Class 1B.”
Garlic Mustard – Alliaria petiolata IntroducedInvasive
Invasive in the US, and recorded in 1 of Utah’s 29 counties. Utah lists Garlic Mustard under “Class 1B.”
Giant Reed – Arundo donax IntroducedInvasive
Invasive in the US, and recorded in 1 of Utah’s 29 counties. Utah lists Giant Reed under “Class 1B.”
Hardheads – Acroptilon repens IntroducedInvasive
Invasive in the US, and recorded in 16 of Utah’s 29 counties. Utah lists Hardheads under “Class 3.”
Harmal Peganum – Peganum harmala Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Harmal Peganum under “Class 1A.”
Japanese Knotweed – Polygonum cuspidatum IntroducedListed
Recorded in 4 of Utah’s 29 counties. Utah lists Japanese Knotweed under “Class 1B.”
Johnsongrass – Sorghum halepense IntroducedInvasive
Invasive in the US, and recorded in 9 of Utah’s 29 counties. Utah lists Johnsongrass under “Class 3.”
Jointed Goatgrass – Aegilops cylindrica IntroducedInvasive
Invasive in the US, and recorded in 20 of Utah’s 29 counties. Utah lists Jointed Goatgrass under “Class 3.”
Leafy Spurge – Euphorbia esula IntroducedInvasive
Invasive in the US, and recorded in 12 of Utah’s 29 counties. Utah lists Leafy Spurge under “Class 2.”
Maltese Star-Thistle – Centaurea melitensis IntroducedInvasive
Invasive in the US, and recorded in 2 of Utah’s 29 counties. Utah lists Maltese Star-Thistle under “Class 1A.”
Mediterranean Sage – Salvia aethiopis Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Mediterranean Sage under “Class 1A.”
Medusahead – Taeniatherum caput-medusae Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Medusahead under “Class 2.”
Nodding Plumeless Thistle – Carduus nutans IntroducedInvasive
Invasive in the US, and recorded in 14 of Utah’s 29 counties. Utah lists Nodding Plumeless Thistle under “Class 3.”
North Africa Grass – Ventenata dubia Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists North Africa Grass under “Class 1A.”
Oxeye Daisy – Leucanthemum vulgare IntroducedInvasive
Invasive in the US, and recorded in 10 of Utah’s 29 counties. Utah lists Oxeye Daisy under “Class 1B.”
Poison Hemlock – Conium maculatum IntroducedInvasive
Invasive in the US, and recorded in 17 of Utah’s 29 counties. Utah lists Poison Hemlock under “Class 3.”
Professor-Weed – Galega officinalis IntroducedInvasive
Invasive in the US, and recorded in 2 of Utah’s 29 counties. Utah lists Professor-Weed under “Class 1B.”
Puncturevine – Tribulus terrestris IntroducedInvasive
Invasive in the US, and recorded in 14 of Utah’s 29 counties. Utah lists Puncturevine under “Class 3.”
Purple Loosestrife – Lythrum salicaria IntroducedInvasive
Invasive in the US, and recorded in 7 of Utah’s 29 counties. Utah lists Purple Loosestrife under “Class 2.”
Quackgrass – Elymus repens IntroducedInvasive
Invasive in the US, and recorded in 18 of Utah’s 29 counties. Utah lists Quackgrass under “Class 3.”
Red Star-Thistle – Centaurea calcitrapa IntroducedInvasive
Invasive in the US, and recorded in 3 of Utah’s 29 counties. Utah lists Red Star-Thistle under “Class 1B.”
Rush Skeletonweed – Chondrilla juncea Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Rush Skeletonweed under “Class 2.”
Saltcedar – Tamarix ramosissima Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Saltcedar under “Class 3.”
Scotch Cottonthistle – Onopordum acanthium IntroducedInvasive
Invasive in the US, and recorded in 11 of Utah’s 29 counties. Utah lists Scotch Cottonthistle under “Class 3.”
Small Bugloss – Anchusa arvensis Not recorded hereListed
Recorded in no Utah county. Utah lists Small Bugloss under “Class 1A.”
Spiny Plumeless Thistle – Carduus acanthoides Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Spiny Plumeless Thistle under “Class 1A.”
Spotted Knapweed – Centaurea stoebe IntroducedInvasive
Invasive in the US, and recorded in 13 of Utah’s 29 counties. Utah lists Spotted Knapweed under “Class 2.”
Spring Milletgrass – Milium vernale Not recorded hereListed
Recorded in no Utah county. Utah lists Spring Milletgrass under “Class 1A.”
Squarrose Knapweed – Centaurea virgata IntroducedListed
Recorded in 2 of Utah’s 29 counties. Utah lists Squarrose Knapweed under “Class 2.”
Syrian Beancaper – Zygophyllum fabago Not recorded hereInvasive
Invasive in the US, and recorded in no Utah county. Utah lists Syrian Beancaper under “Class 1A.”
Yellow Star-Thistle – Centaurea solstitialis IntroducedInvasive
Invasive in the US, and recorded in 7 of Utah’s 29 counties. Utah lists Yellow Star-Thistle under “Class 2.”
No plant on Utah’s list matches that.
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 |
|---|---|---|---|
| Blood Grass | Imperata cylindrica | ProhibitedInvasiveUtah says “Class 4” | Douglas' Sedge, Threadleaf Sedge, Indian Ricegrass |
| Creeping Spurge | Euphorbia myrsinites | ProhibitedUtah says “Class 4” | — |
| Dames Rocket | Hesperis matronalis | ProhibitedInvasiveUtah says “Class 4” | Nettleleaf Giant Hyssop, Oneflower Helianthella, Gooseberryleaf Globemallow |
| Russian Olive | Elaeagnus angustifolia | ProhibitedInvasiveUtah says “Class 4” | Basin Big Sagebrush, Silver Buffaloberry, Western Hackberry |
| Scotch Broom | Cytisus scoparius | ProhibitedInvasiveUtah says “Class 4” | Colorado Barberry, Desert Ceanothus, Apache Plume |
| Asian Mustard | Brassica tournefortii | ListedInvasiveUtah says “Class 1B” | — |
| Bermuda Grass | Cynodon dactylon | ListedInvasiveUtah says “Class 3” | — |
| Black Henbane | Hyoscyamus niger | ListedInvasiveUtah says “Class 2” | — |
| Broadleaved Pepperweed | Lepidium latifolium | ListedInvasiveUtah says “Class 3” | — |
| Butter and Eggs | Linaria vulgaris | ListedInvasiveUtah says “Class 2” | — |
| Camelthorn | Alhagi maurorum | ListedInvasiveUtah says “Class 1B” | — |
| Canada Thistle | Cirsium arvense | ListedInvasiveUtah says “Class 3” | — |
| Columbus Grass | Sorghum almum | ListedUtah says “Class 3” | — |
| Common Crupina | Crupina vulgaris | ListedInvasiveUtah says “Class 1A” | — |
| Common Reed | Phragmites australis | ListedUtah says “Class 3” | — |
| Common St. Johnswort | Hypericum perforatum | ListedInvasiveUtah says “Class 1B” | — |
| Common Viper's Bugloss | Echium vulgare | ListedInvasiveUtah says “Class 1B” | — |
| Cutleaf Vipergrass | Scorzonera laciniata | ListedInvasiveUtah says “Class 1B” | — |
| Dalmatian Toadflax | Linaria dalmatica | ListedInvasiveUtah says “Class 2” | — |
| Diffuse Knapweed | Centaurea diffusa | ListedInvasiveUtah says “Class 2” | — |
| Dyer's Woad | Isatis tinctoria | ListedInvasiveUtah says “Class 2” | — |
| Elongated Mustard | Brassica elongata | ListedUtah says “Class 1B” | — |
| Garlic Mustard | Alliaria petiolata | ListedInvasiveUtah says “Class 1B” | — |
| Giant Reed | Arundo donax | ListedInvasiveUtah says “Class 1B” | — |
| Hardheads | Acroptilon repens | ListedInvasiveUtah says “Class 3” | — |
| Harmal Peganum | Peganum harmala | ListedInvasiveUtah says “Class 1A” | — |
| Japanese Knotweed | Polygonum cuspidatum | ListedUtah says “Class 1B” | — |
| Johnsongrass | Sorghum halepense | ListedInvasiveUtah says “Class 3” | — |
| Jointed Goatgrass | Aegilops cylindrica | ListedInvasiveUtah says “Class 3” | — |
| Leafy Spurge | Euphorbia esula | ListedInvasiveUtah says “Class 2” | — |
| Maltese Star-Thistle | Centaurea melitensis | ListedInvasiveUtah says “Class 1A” | — |
| Mediterranean Sage | Salvia aethiopis | ListedInvasiveUtah says “Class 1A” | — |
| Medusahead | Taeniatherum caput-medusae | ListedInvasiveUtah says “Class 2” | — |
| Nodding Plumeless Thistle | Carduus nutans | ListedInvasiveUtah says “Class 3” | — |
| North Africa Grass | Ventenata dubia | ListedInvasiveUtah says “Class 1A” | — |
| Oxeye Daisy | Leucanthemum vulgare | ListedInvasiveUtah says “Class 1B” | — |
| Poison Hemlock | Conium maculatum | ListedInvasiveUtah says “Class 3” | — |
| Professor-Weed | Galega officinalis | ListedInvasiveUtah says “Class 1B” | — |
| Puncturevine | Tribulus terrestris | ListedInvasiveUtah says “Class 3” | — |
| Purple Loosestrife | Lythrum salicaria | ListedInvasiveUtah says “Class 2” | Canada Goldenrod, Cutleaf Waterparsnip, Common Cowparsnip |
| Quackgrass | Elymus repens | ListedInvasiveUtah says “Class 3” | — |
| Red Star-Thistle | Centaurea calcitrapa | ListedInvasiveUtah says “Class 1B” | — |
| Rush Skeletonweed | Chondrilla juncea | ListedInvasiveUtah says “Class 2” | — |
| Saltcedar | Tamarix ramosissima | ListedInvasiveUtah says “Class 3” | — |
| Scotch Cottonthistle | Onopordum acanthium | ListedInvasiveUtah says “Class 3” | — |
| Small Bugloss | Anchusa arvensis | ListedUtah says “Class 1A” | — |
| Spiny Plumeless Thistle | Carduus acanthoides | ListedInvasiveUtah says “Class 1A” | — |
| Spotted Knapweed | Centaurea stoebe | ListedInvasiveUtah says “Class 2” | — |
| Spring Milletgrass | Milium vernale | ListedUtah says “Class 1A” | — |
| Squarrose Knapweed | Centaurea virgata | ListedUtah says “Class 2” | — |
| Syrian Beancaper | Zygophyllum fabago | ListedInvasiveUtah says “Class 1A” | — |
| Yellow Star-Thistle | Centaurea solstitialis | ListedInvasiveUtah says “Class 2” | — |
Where this comes from
- Utah listings
- Utah Admin. Code R68-9. 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 Utah’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 Utah
Plants that two or more states bordering Utah regulate, and Utah 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.
- Kariba-Weed Salvinia molesta regulated in Arizona, Colorado, Idaho, Nevada, New Mexico
- Eurasian Watermilfoil Myriophyllum spicatum regulated in Colorado, Idaho, Nevada, New Mexico
- Waterthyme Hydrilla verticillata regulated in Arizona, Colorado, Idaho, Nevada
- Bull Thistle Cirsium vulgare regulated in Arizona, Colorado, New Mexico
- Cheatgrass Bromus tectorum regulated in Arizona, Colorado, New Mexico
- Curly Pondweed Potamogeton crispus regulated in Idaho, Nevada, New Mexico
- Field Bindweed Convolvulus arvensis regulated in Arizona, Colorado, Idaho
- Field Sowthistle Sonchus arvensis regulated in Colorado, Idaho, Nevada
- Flowering Rush Butomus umbellatus regulated in Colorado, Idaho, Nevada
- Gypsyflower Cynoglossum officinale regulated in Colorado, Idaho, Nevada
- Parrot Feather Watermilfoil Myriophyllum aquaticum regulated in Colorado, Idaho, New Mexico
- Saltlover Halogeton glomeratus regulated in Arizona, Colorado, New Mexico
- Siberian Elm Ulmus pumila regulated in Arizona, Colorado, New Mexico
- Tree of Heaven Ailanthus altissima regulated in Arizona, Colorado, New Mexico
- Bohemian Knotweed Polygonum x bohemicum regulated in Colorado, Idaho
Questions
Is there an official Utah invasive species list?
Not under that name. Utah's legal list is a noxious-weed list: 52 plants named under Utah Admin. Code R68-9, 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 44 of these 52 as invasive in the lower 48 states. That is an ecological finding, not a ruling by Utah. This page shows both side by side.
What plants are illegal to sell in Utah?
Utah'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. 52 plants are named under Utah Admin. Code R68-9. A noxious-weed listing does not automatically ban nursery sale, so check the rule itself before assuming a plant cannot be bought or sold.
Is my plant invasive in Utah?
Search the table on this page for Utah's legal determination, then look for the Invasive chip beside it, which is a separate ecological finding from GRIIS rather than a ruling by Utah. 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 Utah 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 Utah?
Not necessarily, and the distinction matters. Utah'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. Utah Admin. Code R68-9 is the text that says what is actually required of you, and it is linked beside every plant here.
Does a plant missing from this list mean it is safe to plant in Utah?
No. This page reproduces what Utah 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.