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Historic District50 species
Connecticut, US
Capen-Clark Historic District
You might spot American Robin, Eastern Poison Ivy, and Duck.
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Where to see Japanese knotweed in Connecticut
We found 15 places featuring Japanese knotweed in Connecticut. Plan your next visit below.
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Botanical Garden1 sightings50 species
Connecticut, US
Connecticut College Arboretum
You might spot Common Mugwort and Canada Goose.
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Historic District50 species
Connecticut, US
Dayville Historic District
You might spot Hay-Scented Fern, Canada Mayflower, and Wood Frog.
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Historic District1 sightings50 species
Connecticut, US
Glastonbury Historic District
You might spot Garlic Mustard and Common Eastern Bumble Bee.
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Historic District50 species
Connecticut, US
Hempstead Historic District
You might spot Common Mugwort, Canada Goose, and American Herring Gull.
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Historic District50 species
Connecticut, US
Riverton Historic District
You might spot Hobblebush, Pink Lady's Slipper, and Red Trillium.
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Historic District1 sightings12 species
Connecticut, US
Cheney Brothers Historic District
You might spot Garlic Mustard, Striped Wintergreen, and Mountain Laurel.
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Historic District1 sightings12 species
Connecticut, US
Coltsville Historic District
You might spot American Robin and Common Eastern Bumble Bee.
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Historic District12 species
Connecticut, US
Downtown Waterbury Historic District
You might spot Eastern Gray Squirrel and Japanese Barberry.
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Historic District1 sightings12 species
Connecticut, US
Hartford Golf Club Historic District
You might spot Common Eastern Bumble Bee and Red-Tailed Hawk.
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Historic District1 sightings12 species
Connecticut, US
Little Hollywood Historic District
You might spot American Robin and Common Eastern Bumble Bee.
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Neighborhood4 sightings12 species
Connecticut, US
Marion
You might spot Blue Jay, Bobcat, and Common Mugwort.
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Forest1 sightings12 species
Connecticut, US
Mohegan State Forest
You might spot American Wintergreen and Pink Lady's Slipper.
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Historic District12 species
Connecticut, US
Overlook Historic District
You might spot Eastern Gray Squirrel and Japanese Barberry.
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Historic District4 sightings12 species
Connecticut, US
Southington Center Historic District
You might spot American Robin, Monarch, and American Pokeweed.
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Take the discovery with you
Looking for Japanese knotweed in Connecticut?
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Japanese knotweed
Common · Plants
Map of Japanese knotweed sightings in Connecticut
Explore clustered snap locations for this species in Connecticut.
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Recent snaps of Japanese knotweed in Connecticut
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.