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Backyard Habitat - Nuisance Weeds

Portland Audubon and Columbia Land Trust have teamed up to create the Backyard Habitat Certification Program, a unique program that supports urban gardeners in their efforts to create natural backyard habitats. ...more ↓

Garlic Mustard 🥈 ¹
Alliaria petiolata

American Pokeweed 🥈 ²
Phytolacca americana

Yellow Archangel 🥈 ³
Lamium galeobdolon

Giant Knotweed 🥈 ⁴
Reynoutria sachalinensis

Japanese knotweed ⁵
Reynoutria japonica

Cutleaf Blackberry ⁶
Rubus laciniatus

Armenian Blackberry ⁷
Rubus armeniacus

himalayan knotweed ⁸
Persicaria wallichii

Himalayan balsam ⁹
Impatiens glandulifera

Meadow Knapweed ¹⁰
Centaurea thuillieri

Yellow Flag Iris 🥈 ¹¹
Iris pseudacorus

Spurge-laurel 🥈 ¹²
Daphne laureola

Traveler's Joy or Old Man's Beard 🥈 ¹³
Clematis vitalba

purple loosestrife ¹⁴
Lythrum salicaria

Diffuse Knapweed 🥈 ¹⁵
Centaurea diffusa

spotted knapweed ¹⁶
Centaurea stoebe

Giant Hogweed ¹⁷
Heracleum mantegazzianum

common ivy ¹⁸
Hedera helix

meadow hawkweed ¹⁹
Pilosella caespitosa

Atlantic Ivy ²⁰
Hedera hibernica

Greenland Hawkweed ²¹
Hieracium lachenalii lachenalii

Orange Hawkweed 🥈 ²²
Pilosella aurantiaca

Smooth Hawkweed 🥈 ²³
Hieracium laevigatum

Scotch Broom ²⁴
Cytisus scoparius

English Hawthorn (<20ft) 🥇 ²⁵
Crataegus monogyna

Mouse-eared Hawkweed 🥈 ²⁶
Pilosella officinarum

Butterfly Bush 🥇 ²⁷
Buddleja davidii

False-brome 🥇 ²⁸
Brachypodium sylvaticum

Creeping Jenny or Moneywort 🏆 ²⁹
Lysimachia nummularia

English Laurel 🏆 ³⁰
Prunus laurocerasus

Reed Canarygrass 🏆 ³¹
Phalaris arundinacea

Lesser Periwinkle 🏆 ³²
Vinca minor

Portuguese Laurel 🏆 ³³
Prunus lusitanica

Greater Periwinkle 🏆 ³⁴
Vinca major

Edited by Jeffrey Lee (he/him/his), and mitchbixby, some rights reserved (CC BY-SA)

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Backyard Habitat - Nuisance Weeds

Garlic Mustard 🥈 1 Alliaria petiolata

American Pokeweed 🥈 2 Phytolacca americana

Yellow Archangel 🥈 3 Lamium galeobdolon

Giant Knotweed 🥈 4 Reynoutria sachalinensis

Japanese knotweed 5 Reynoutria japonica

Cutleaf Blackberry 6 Rubus laciniatus

Armenian Blackberry 7 Rubus armeniacus

himalayan knotweed 8 Persicaria wallichii

Himalayan balsam 9 Impatiens glandulifera

Meadow Knapweed 10 Centaurea thuillieri

Yellow Flag Iris 🥈 11 Iris pseudacorus

Spurge-laurel 🥈 12 Daphne laureola

Traveler's Joy or Old Man's Beard 🥈 13 Clematis vitalba

purple loosestrife 14 Lythrum salicaria

Diffuse Knapweed 🥈 15 Centaurea diffusa

spotted knapweed 16 Centaurea stoebe

Giant Hogweed 17 Heracleum mantegazzianum

common ivy 18 Hedera helix

meadow hawkweed 19 Pilosella caespitosa

Atlantic Ivy 20 Hedera hibernica

Greenland Hawkweed 21 Hieracium lachenalii lachenalii

Orange Hawkweed 🥈 22 Pilosella aurantiaca

Smooth Hawkweed 🥈 23 Hieracium laevigatum

Scotch Broom 24 Cytisus scoparius

English Hawthorn (<20ft) 🥇 25 Crataegus monogyna

Mouse-eared Hawkweed 🥈 26 Pilosella officinarum

Butterfly Bush 🥇 27 Buddleja davidii

False-brome 🥇 28 Brachypodium sylvaticum

Creeping Jenny or Moneywort 🏆 29 Lysimachia nummularia

English Laurel 🏆 30 Prunus laurocerasus

Reed Canarygrass 🏆 31 Phalaris arundinacea

Lesser Periwinkle 🏆 32 Vinca minor

Portuguese Laurel 🏆 33 Prunus lusitanica

Greater Periwinkle 🏆 34 Vinca major