Amur Honeysuckle – Lonicera maackii IntroducedInvasive
Invasive in the US, and recorded in 11 of Pennsylvania’s 67 counties. Pennsylvania lists Amur Honeysuckle under “Class B.”
Pennsylvania (PA) regulates 57 invasive plants under 3 Pa.C.S. 1501-1562 (Act 46 of 2017). Pennsylvania'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.
Pennsylvania restricts 57 plants, including Purple Loosestrife, Canada Thistle and Waterthyme. Plants marked Prohibited may not be sold, propagated, or moved within Pennsylvania. 49 of the 57 are also flagged invasive by GRIIS, which is an ecological finding rather than a ruling by Pennsylvania. Checked against 3 Pa.C.S. 1501-1562 (Act 46 of 2017) on July 20, 2026.
Invasive in the US, and recorded in 11 of Pennsylvania’s 67 counties. Pennsylvania lists Amur Honeysuckle under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Animated Oat under “Class A.”
Invasive in the US, and recorded in 9 of Pennsylvania’s 67 counties. Pennsylvania lists Asiatic Tearthumb under “Class B.”
Recorded in no Pennsylvania county. Pennsylvania lists Basketgrass under “Class A.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Blood Grass under “Class A.”
Recorded in no Pennsylvania county. Pennsylvania lists Bohemian Knotweed under “Class B.”
Invasive in the US, and recorded in 28 of Pennsylvania’s 67 counties. Pennsylvania lists Border Privet under “Class B.”
Invasive in the US, and recorded in 4 of Pennsylvania’s 67 counties. Pennsylvania lists Brazilian Waterweed under “Class A.”
Invasive in the US, and recorded in 64 of Pennsylvania’s 67 counties. Pennsylvania lists Bull Thistle under “Class B.”
Invasive in the US, and recorded in 14 of Pennsylvania’s 67 counties. Pennsylvania lists Burning Bush under “Class B.”
Invasive in the US, and recorded in 2 of Pennsylvania’s 67 counties. Pennsylvania lists Callery Pear under “Class B.”
Invasive in the US, and recorded in 61 of Pennsylvania’s 67 counties. Pennsylvania lists Canada Thistle under “Class B.”
Recorded in 4 of Pennsylvania’s 67 counties. Pennsylvania lists Carelessweed under “Class A.”
Invasive in the US, and recorded in 16 of Pennsylvania’s 67 counties. Pennsylvania lists Common Buckthorn under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Common Frogbit under “Class A.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Common Wormwood under “Class B.”
Invasive in the US, and recorded in 23 of Pennsylvania’s 67 counties. Pennsylvania lists Eurasian Watermilfoil under “Class B.”
Invasive in the US, and recorded in 1 of Pennsylvania’s 67 counties. Pennsylvania lists European Swallow-Wort under “Class B.”
Recorded in 1 of Pennsylvania’s 67 counties. Pennsylvania lists European Wand Loosestrife under “Class B.”
Invasive in the US, and recorded in 10 of Pennsylvania’s 67 counties. Pennsylvania lists Fig Buttercup under “Class B.”
Invasive in the US, and recorded in 6 of Pennsylvania’s 67 counties. Pennsylvania lists Fiveleaf Akebia under “Class A.”
Invasive in the US, and recorded in 38 of Pennsylvania’s 67 counties. Pennsylvania lists Garlic Mustard under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Giant Hogweed under “Class A.”
Invasive in the US, and recorded in 23 of Pennsylvania’s 67 counties. Pennsylvania lists Giant Knotweed under “Class B.”
Invasive in the US, and recorded in 16 of Pennsylvania’s 67 counties. Pennsylvania lists Glossy Buckthorn under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Japanese Angelica Tree under “Class B.”
Invasive in the US, and recorded in 51 of Pennsylvania’s 67 counties. Pennsylvania lists Japanese Barberry under “Class B.”
Invasive in the US, and recorded in 19 of Pennsylvania’s 67 counties. Pennsylvania lists Japanese Hop under “Class B.”
Invasive in the US, and recorded in 43 of Pennsylvania’s 67 counties. Pennsylvania lists Japanese Knotweed under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Japanese Privet under “Class A.”
Invasive in the US, and recorded in 13 of Pennsylvania’s 67 counties. Pennsylvania lists Johnsongrass under “Class B.”
Invasive in the US, and recorded in 3 of Pennsylvania’s 67 counties. Pennsylvania lists Large-Flower Primrose-Willow under “Class A.”
Invasive in the US, and recorded in 10 of Pennsylvania’s 67 counties. Pennsylvania lists Louise's Swallow-Wort under “Class B.”
Invasive in the US, and recorded in 42 of Pennsylvania’s 67 counties. Pennsylvania lists Morrow's Honeysuckle under “Class B.”
Invasive in the US, and recorded in 35 of Pennsylvania’s 67 counties. Pennsylvania lists Multiflora Rose under “Class B.”
Invasive in the US, and recorded in 20 of Pennsylvania’s 67 counties. Pennsylvania lists Nepalese Browntop under “Class B.”
Invasive in the US, and recorded in 18 of Pennsylvania’s 67 counties. Pennsylvania lists Nodding Plumeless Thistle under “Class B.”
Invasive in the US, and recorded in 22 of Pennsylvania’s 67 counties. Pennsylvania lists Oriental Bittersweet under “Class B.”
Invasive in the US, and recorded in 6 of Pennsylvania’s 67 counties. Pennsylvania lists Parrot Feather Watermilfoil under “Class A.”
Invasive in the US, and recorded in 64 of Pennsylvania’s 67 counties. Pennsylvania lists Parsnip under “Class B.”
Recorded in no Pennsylvania county. Pennsylvania lists Plume Grass under “Class A.”
Invasive in the US, and recorded in 35 of Pennsylvania’s 67 counties. Pennsylvania lists Poison Hemlock under “Class B.”
Invasive in the US, and recorded in 3 of Pennsylvania’s 67 counties. Pennsylvania lists Professor-Weed under “Class A.”
Invasive in the US, and recorded in 36 of Pennsylvania’s 67 counties. Pennsylvania lists Purple Loosestrife under “Class B.”
Recorded in 8 of Pennsylvania’s 67 counties. Pennsylvania lists Roughfruit Amaranth under “Class A.”
Invasive in the US, and recorded in 10 of Pennsylvania’s 67 counties. Pennsylvania lists Showy Fly Honeysuckle under “Class B.”
Invasive in the US, and recorded in 22 of Pennsylvania’s 67 counties. Pennsylvania lists Sorghum under “Class B.”
Recorded in 5 of Pennsylvania’s 67 counties. Pennsylvania lists Standish's Honeysuckle under “Class B.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Sunshine Chinese Privet under “Class B.”
Invasive in the US, and recorded in 24 of Pennsylvania’s 67 counties. Pennsylvania lists Tatarian Honeysuckle under “Class B.”
Invasive in the US, and recorded in 36 of Pennsylvania’s 67 counties. Pennsylvania lists Tree of Heaven under “Class B.”
Invasive in the US, and recorded in 3 of Pennsylvania’s 67 counties. Pennsylvania lists Water Chestnut under “Class A.”
Recorded in no Pennsylvania county. Pennsylvania lists Water Soldiers under “Class C.”
Invasive in the US, and recorded in no Pennsylvania county. Pennsylvania lists Waterthyme under “Class B.”
Invasive in the US, and recorded in 8 of Pennsylvania’s 67 counties. Pennsylvania lists Wild Chervil under “Class A.”
Invasive in the US, and recorded in 26 of Pennsylvania’s 67 counties. Pennsylvania lists Wild Privet under “Class B.”
Invasive in the US, and recorded in 2 of Pennsylvania’s 67 counties. Pennsylvania lists Yellow Floatingheart under “Class A.”
No plant on Pennsylvania’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 Pennsylvania 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 |
|---|---|---|---|
| Amur Honeysuckle | Lonicera maackii | ProhibitedInvasivePennsylvania says “Class B” | Common Witch Hazel, Smooth Sumac, Shining Willow |
| Animated Oat | Avena sterilis | ProhibitedInvasivePennsylvania says “Class A” | — |
| Asiatic Tearthumb | Polygonum perfoliatum | ProhibitedInvasivePennsylvania says “Class B” | — |
| Basketgrass | Oplismenus hirtellus | ProhibitedPennsylvania says “Class A” | — |
| Blood Grass | Imperata cylindrica | ProhibitedInvasivePennsylvania says “Class A” | Velvet Bentgrass, Flatstem Spikerush, Purple Love Grass |
| Bohemian Knotweed | Polygonum x bohemicum | ProhibitedPennsylvania says “Class B” | — |
| Border Privet | Ligustrum obtusifolium | ProhibitedInvasivePennsylvania says “Class B” | White Meadowsweet, Sandcherry, American Black Currant |
| Brazilian Waterweed | Egeria densa | ProhibitedInvasivePennsylvania says “Class A” | — |
| Bull Thistle | Cirsium vulgare | ProhibitedInvasivePennsylvania says “Class B” | — |
| Burning Bush | Euonymus alatus | ProhibitedInvasivePennsylvania says “Class B” | Russet Buffaloberry, Mapleleaf Viburnum, Coastal Serviceberry |
| Callery Pear | Pyrus calleryana | ProhibitedInvasivePennsylvania says “Class B” | Paper Birch, Sassafras, Pin Cherry |
| Canada Thistle | Cirsium arvense | ProhibitedInvasivePennsylvania says “Class B” | — |
| Carelessweed US native | Amaranthus palmeri | ProhibitedPennsylvania says “Class A” | — |
| Common Buckthorn | Rhamnus cathartica | ProhibitedInvasivePennsylvania says “Class B” | Common Witch Hazel, Smooth Sumac, Shining Willow |
| Common Frogbit | Hydrocharis morsus-ranae | ProhibitedInvasivePennsylvania says “Class A” | — |
| Common Wormwood | Artemisia vulgaris | ProhibitedInvasivePennsylvania says “Class B” | Common Sneeze Weed, Canadian Milkvetch, Purple Coneflower |
| Eurasian Watermilfoil | Myriophyllum spicatum | ProhibitedInvasivePennsylvania says “Class B” | — |
| European Swallow-Wort | Cynanchum rossicum | ProhibitedInvasivePennsylvania says “Class B” | — |
| European Wand Loosestrife | Lythrum virgatum | ProhibitedPennsylvania says “Class B” | Great St. Johnswort, Canada Goldenrod, Common Cowparsnip |
| Fig Buttercup | Ranunculus ficaria | ProhibitedInvasivePennsylvania says “Class B” | Longbeak Buttercup, Beach Pea, Blue Eyed Grass |
| Fiveleaf Akebia | Akebia quinata | ProhibitedInvasivePennsylvania says “Class A” | — |
| Garlic Mustard | Alliaria petiolata | ProhibitedInvasivePennsylvania says “Class B” | — |
| Giant Hogweed | Heracleum mantegazzianum | ProhibitedInvasivePennsylvania says “Class A” | — |
| Giant Knotweed | Polygonum sachalinense | ProhibitedInvasivePennsylvania says “Class B” | — |
| Glossy Buckthorn | Frangula alnus | ProhibitedInvasivePennsylvania says “Class B” | Shining Willow, Speckled Alder, Eastern Baccharis |
| Japanese Angelica Tree | Aralia elata | ProhibitedInvasivePennsylvania says “Class B” | Hercules's Club, Fireberry Hawthorn, Shining Willow |
| Japanese Barberry | Berberis thunbergii | ProhibitedInvasivePennsylvania says “Class B” | White Meadowsweet, Blue Huckleberry, Mountain Laurel |
| Japanese Hop | Humulus japonicus | ProhibitedInvasivePennsylvania says “Class B” | — |
| Japanese Knotweed | Fallopia japonica (potentially invasive weed) | ProhibitedInvasivePennsylvania says “Class B” | — |
| Japanese Privet | Ligustrum japonicum | ProhibitedInvasivePennsylvania says “Class A” | — |
| Johnsongrass | Sorghum halepense | ProhibitedInvasivePennsylvania says “Class B” | — |
| Large-Flower Primrose-Willow | Ludwigia grandiflora | ProhibitedInvasivePennsylvania says “Class A” | — |
| Louise's Swallow-Wort | Cynanchum louiseae | ProhibitedInvasivePennsylvania says “Class B” | — |
| Morrow's Honeysuckle | Lonicera morrowii | ProhibitedInvasivePennsylvania says “Class B” | White Meadowsweet, Sandcherry, American Black Currant |
| Multiflora Rose | Rosa multiflora | ProhibitedInvasivePennsylvania says “Class B” | American Black Currant, Coastal Serviceberry, White Meadowsweet |
| Nepalese Browntop | Microstegium vimineum | ProhibitedInvasivePennsylvania says “Class B” | — |
| Nodding Plumeless Thistle | Carduus nutans | ProhibitedInvasivePennsylvania says “Class B” | — |
| Oriental Bittersweet | Celastrus orbiculatus | ProhibitedInvasivePennsylvania says “Class B” | American Bittersweet, Trumpet Honeysuckle, Yellow Passionflower |
| Parrot Feather Watermilfoil | Myriophyllum aquaticum | ProhibitedInvasivePennsylvania says “Class A” | — |
| Parsnip | Pastinaca sativa | ProhibitedInvasivePennsylvania says “Class B” | — |
| Plume Grass | Saccharum ravennae (Erianthus ravennae) | ProhibitedPennsylvania says “Class A” | — |
| Poison Hemlock | Conium maculatum | ProhibitedInvasivePennsylvania says “Class B” | — |
| Professor-Weed | Galega officinalis | ProhibitedInvasivePennsylvania says “Class A” | — |
| Purple Loosestrife | Lythrum salicaria | ProhibitedInvasivePennsylvania says “Class B” | Great St. Johnswort, Canada Goldenrod, Common Cowparsnip |
| Roughfruit Amaranth US native | Amaranthus tuberculatus | ProhibitedPennsylvania says “Class A” | — |
| Showy Fly Honeysuckle | Lonicera x bella | ProhibitedInvasivePennsylvania says “Class B” | White Meadowsweet, Sandcherry, American Black Currant |
| Sorghum | Sorghum bicolor | ProhibitedInvasivePennsylvania says “Class B” | — |
| Standish's Honeysuckle | Lonicera standishii | ProhibitedPennsylvania says “Class B” | — |
| Sunshine Chinese Privet | Ligustrum sinense 'Sunshine' | ProhibitedInvasivePennsylvania says “Class B” | — |
| Tatarian Honeysuckle | Lonicera tatarica | ProhibitedInvasivePennsylvania says “Class B” | American Fly Honeysuckle, Swamp Fly Honeysuckle, American Black Currant |
| Tree of Heaven | Ailanthus altissima | ProhibitedInvasivePennsylvania says “Class B” | Western Catalpa, Kentucky Coffeetree, Post Oak |
| Water Chestnut | Trapa natans | ProhibitedInvasivePennsylvania says “Class A” | — |
| Water Soldiers | Stratiotes aloides | ProhibitedPennsylvania says “Class C” | — |
| Waterthyme | Hydrilla verticillata | ProhibitedInvasivePennsylvania says “Class B” | — |
| Wild Chervil | Anthriscus sylvestris | ProhibitedInvasivePennsylvania says “Class A” | — |
| Wild Privet | Ligustrum vulgare | ProhibitedInvasivePennsylvania says “Class B” | White Meadowsweet, Sandcherry, American Black Currant |
| Yellow Floatingheart | Nymphoides peltata | ProhibitedInvasivePennsylvania says “Class A” | — |
Where this comes from
Plants that two or more states bordering Pennsylvania regulate, and Pennsylvania 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.
Yes. 3 Pa.C.S. 1501-1562 (Act 46 of 2017) is Pennsylvania's list, naming 57 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 49 of these 57 as invasive in the lower 48 states. That is an ecological finding, not a ruling by Pennsylvania. This page shows both side by side.
57 plants are regulated under 3 Pa.C.S. 1501-1562 (Act 46 of 2017). Plants marked Prohibited may not be sold, propagated, or moved within Pennsylvania. Plants marked Restricted carry narrower limits set by the rule.
Search the table on this page for Pennsylvania's legal determination, then look for the Invasive chip beside it, which is a separate ecological finding from GRIIS rather than a ruling by Pennsylvania. 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 Pennsylvania status alongside whether USDA records it as native to your specific county. Every answer links the record it came from.
For the plants marked Prohibited, 3 Pa.C.S. 1501-1562 (Act 46 of 2017) bars selling, propagating, or moving them within Pennsylvania. 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.
No. This page reproduces what Pennsylvania 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