Japanese knotweed
Where to see Japanese knotweed
We found 50 places featuring Japanese knotweed. Plan your next visit below.
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Common · Plants
Map of Japanese knotweed sightings
Explore clustered snap locations for this species to see where it has been observed.
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📍 British Columbia (2)📍 Connecticut (15)📍 District of Columbia (8)📍 Maine (7)📍 Maryland (2)📍 Massachusetts (16)📍 Michigan (2)📍 New Hampshire (3)📍 New Jersey (5)📍 New York (11)📍 Ohio (3)📍 Pennsylvania (4)📍 Rhode Island (12)📍 Vermont (5)📍 Virginia (3)📍 West Virginia (2)📍 CA (4)📍 US (104)
Park43 sightings50 species
Tennessee, US
American Baptist College
You might spot House Sparrow, Northern Mockingbird, and Gulf Fritillary.
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Park44 sightings50 species
Massachusetts, US
Ames Nowell State Park
You might spot Eastern White Pine and Common Eastern Bumble Bee.
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Park41 sightings50 species
Michigan, US
Arden Park–East Boston Historic District
You might spot Eastern Gray Squirrel, Tree-Of-Heaven, and House Sparrow.
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Park43 sightings50 species
Massachusetts, US
Arnold Arboretum
You might spot Eastern Cottontail and American Robin.
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Park36 sightings50 species
Rhode Island, US
Ashton Historic District
You might spot Common Mugwort, Duck, and Azure Bluet.
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Park47 sightings50 species
Rhode Island, US
Barrington Civic Center Historic District
You might spot Common Eastern Bumble Bee and Osprey.
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Park43 sightings50 species
Rhode Island, US
Bellevue Avenue Historic District
You might spot Rugosa Rose and American Herring Gull.
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Park44 sightings50 species
Ohio, US
Blackhand Gorge State Nature Preserve
You might spot Large White Trillium, Fire Pink, and Christmas Fern.
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Park45 sightings50 species
Rhode Island, US
Blackstone Boulevard–Cole Avenue–Grotto Avenue Historic District
You might spot Spotted Lanternfly, Duck, and American Robin.
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Park50 sightings50 species
District of Columbia, US
Bloomingdale
You might spot Eastern Gray Squirrel, Duck, and House Sparrow.
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Park37 sightings50 species
Vermont, US
Brattleboro Downtown Historic District
You might spot Asian Bittersweet, Alder Buckthorn, and Eastern Newt.
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Park48 sightings50 species
Vermont, US
Bristol Downtown Historic District
You might spot Japanese Knotweed and Red-Bellied Woodpecker.
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Park43 sightings50 species
Rhode Island, US
Broadway-Armory Historic District
You might spot Spotted Lanternfly, Duck, and American Robin.
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Park47 sightings50 species
New York, US
Brooklyn Botanic Garden
You might spot American Robin, Pond Slider, and Northern Cardinal.
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Park46 sightings50 species
Connecticut, US
Capen-Clark Historic District
You might spot American Robin, Eastern Poison Ivy, and Duck.
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Park49 sightings50 species
Maine, US
Carriage Paths, Bridges and Gatehouses
You might spot American Bullfrog and Three-Toothed Cinquefoil.
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Park46 sightings50 species
New Jersey, US
Cedar Brook Park
You might spot White-Tailed Deer and Eastern Gray Squirrel.
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Park45 sightings50 species
New York, US
Cedarmere-Clayton Estates
You might spot Common Eastern Bumble Bee and American Robin.
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Park34 sightings50 species
Massachusetts, US
Chesterfield Gorge
You might spot Mountain Laurel, Azure Bluet, and Partridgeberry.
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Park44 sightings50 species
Massachusetts, US
Chestnut Street District
You might spot Common Eastern Bumble Bee and Asian Lady Beetle.
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Park48 sightings50 species
District of Columbia, US
Cleveland Park
You might spot Spotted Lanternfly and Eastern Gray Squirrel.
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Park43 sightings50 species
Connecticut, US
Connecticut College Arboretum
You might spot Common Mugwort and Canada Goose.
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Park32 sightings50 species
Vermont, US
Currier Park Historic District
You might spot Eastern White Pine, Staghorn Sumac, and Box Elder.
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Park43 sightings50 species
Rhode Island, US
Customhouse Historic District
You might spot Spotted Lanternfly, American Robin, and Duck.
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Park37 sightings50 species
Rhode Island, US
Davisville Historic District
You might spot Common Eastern Bumble Bee and Asian Lady Beetle.
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Park46 sightings50 species
Connecticut, US
Dayville Historic District
You might spot Hay-Scented Fern, Canada Mayflower, and Wood Frog.
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Park46 sightings50 species
New Hampshire, US
Derryfield Park
You might spot Eastern White Pine, Eastern Skunk Cabbage, and Duck.
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Park43 sightings50 species
Rhode Island, US
Downtown Providence Historic District
You might spot Spotted Lanternfly, American Robin, and Duck.
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Park41 sightings50 species
Massachusetts, US
Drumlin Farm Wildlife Sanctuary
You might spot Turkey, Garter Snake, and Multiflora Rose.
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Park46 sightings50 species
New Jersey, US
Duke Gardens
You might spot Monarch, Great Blue Heron, and American Robin.
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Park47 sightings50 species
Ohio, US
Forest Hill Park
You might spot Duck, Canada Goose, and Muscovy Duck.
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Park42 sightings50 species
Connecticut, US
Glastonbury Historic District
You might spot Garlic Mustard and Common Eastern Bumble Bee.
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Park45 sightings50 species
Maryland, US
Glen Echo Park
You might spot Common Pawpaw and Feather-Edged Petrophila.
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Park50 sightings50 species
Maine, US
Harraseeket Historic District
You might spot Ghost Pipe, Pink Lady's Slipper, and Bluebead Lily.
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Park44 sightings50 species
Connecticut, US
Hempstead Historic District
You might spot Common Mugwort, Canada Goose, and American Herring Gull.
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Park47 sightings50 species
Pennsylvania, US
Historic Moravian Bethlehem Historic District
You might spot Tree-Of-Heaven, Spotted Lanternfly, and American Tuliptree.
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Park44 sightings50 species
Rhode Island, US
India Point Park
You might spot Spotted Lanternfly, Duck, and American Robin.
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Park50 sightings50 species
New York, US
Jumel Terrace Historic District
You might spot White Snakeroot, Common Mugwort, and Eastern Gray Squirrel.
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Park49 sightings50 species
District of Columbia, US
Lafayette Square Historic District
You might spot Eastern Gray Squirrel, Spotted Lanternfly, and Duck.
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Park47 sightings50 species
Pennsylvania, US
McDade Park
You might spot Spotted Lanternfly and Japanese Knotweed.
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Park47 sightings50 species
Massachusetts, US
Mystic River Reservation
You might spot Common Eastern Bumble Bee, Bee, and American Robin.
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Park45 sightings50 species
Rhode Island, US
Norman Bird Sanctuary
You might spot Great Blue Heron, Painted Turtle, and Sensitive Fern.
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Park27 sightings50 species
Pennsylvania, US
North Park
You might spot White-Tailed Deer, Eastern Skunk Cabbage, and Canada Goose.
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Park49 sightings50 species
US
North and South Brother Islands
You might spot Common Mugwort, Common Milkweed, and White Snakeroot.
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Park41 sightings50 species
US
Ocean Drive Historic District
You might spot Rugosa Rose and American Herring Gull.
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Park40 sightings50 species
Québec, CA
Parc linéaire de la rivière Saint-Charles
You might spot Common Eastern Bumble Bee and Asian Lady Beetle.
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Park39 sightings50 species
Michigan, US
Piquette Avenue Industrial Historic District
You might spot Eastern Gray Squirrel, Rock Pigeon, and House Sparrow.
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Park47 sightings50 species
Virginia, US
Popes Head Park
You might spot Eastern Gray Squirrel and Spotted Lanternfly.
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Park43 sightings50 species
Rhode Island, US
Prospect Terrace Park
You might spot Spotted Lanternfly and American Robin.
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Park49 sightings50 species
Vermont, US
Randolph Center Historic District
You might spot Northern Cardinal, Wood Frog, and White-Breasted Nuthatch.
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Recent snaps of Japanese knotweed
May 30, 2026
Hartford Golf Club Historic Districti
Photo attribution
(c) Sheila S, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.