Sometimes plants used in landscapes are actually invasive plants and noxious weeds which will crowd out native plants. Avoid planting these plants. It is illegal to plant or transport plants which are listed as Oregon Noxious Weeds.
These weeds have been selected as top priority for control. The complete list of Oregon noxious weeds can be found at Oregon Noxious Weeds
Trees Ailanthus altissima Tree of Heaven Oregon Noxious Weed Crataegus monogyna Oneseed Hawthorn Elaeagnus angustifolia Russian Olive Oregon Noxious Weed Shrubs Buddleia davidii Butterfly Bush Oregon Noxious Weed Buddleia variabilis Butterfly Bush Oregon Noxious Weed Cytisus scoparius Scotch Broom Oregon Noxious Weed Cytisus striatus Portuguese Broom Oregon Noxious Weed Daphne laureola Spurge Laurel Oregon Noxious Weed Genista monspessulana French Broom Oregon Noxious Weed Ilex aquifolium English Holly Oregon Noxious Weed Polygonum cuspidatum Japanese Knotweed Oregon Noxious Weed Polygonum sachalinense Giant Knotweed Oregon Noxious Weed Polygonum polystchyum Himalayan Knotweed Oregon Noxious Weed Rubus armeniacus Armenian Blackberry Oregon Noxious Weed Rubus discolor Himalayan Blackberry Oregon Noxious Weed Rubus procerus Himalayan Blackberry Oregon Noxious Weed Spartium junceum Spanish Broom Oregon Noxious Weed Tamarix ramosissima Tamarisk, Salt Cedar Oregon Noxious Weed Ulex europaeus Gorse Oregon Noxious Weed Groundcovers and Vines Clematis vitalba Old Man's Beard Oregon Noxious Weed Hedera helix English Ivy Oregon Noxious Weed Hedera hibernica Irish Ivy Oregon Noxious Weed Annuals and Perennials Centaurea cyanus Bachelor's Buttons, Cornflower Oregon Noxious Weed Centaurea macrocephala Bighead Knapweed Oregon Noxious Weed Centaurea pratensis Meadow Knapweed Oregon Noxious Weed Cortaderia jubata Jubata Grass, Purple Pampasgrass Oregon Noxious Weed Euphorbia esula Leafy Spurge Oregon Noxious Weed Euphorbia myrsinites Myrtle Spurge Oregon Noxious Weed Foeniculum vulgare Fennel Geranium robertianum Herb Robert, Stinky Bob Oregon Noxious Weed Geranium lucidum Shining Geranium Oregon Noxious Weed Hieracium floribundum Yellow Hawkweed Oregon Noxious Weed Hieracium aurantiacum Orange Hawkweed Oregon Noxious Weed Impatiens glandulifera Policeman's Helmet, Jewelweed Oregon Noxious Weed Linaria dalmatica Dalmatian Toadflax Oregon Noxious Weed Linaria vulgaris Yellow Toadflax Oregon Noxious Weed Lythrum salicaria Purple Loosestrife Oregon Noxious Weed Phlaris arundinacea Ribbongrass, Reed Canarygrass Aquatic and Wetland Plants Egeria densa Brazilian Elodea Oregon Noxious Weed Iris pseudoacorus Yellow Flag Iris Oregon Noxious Weed Lythrum salicaria Purple Loosestrife Oregon Noxious Weed Myriophyllum aquaticum Parrot Feather Oregon Noxious Weed
Click on Oregon Noxious Weeds Profiles for pictures and descriptions of noxious weeds. A Listed Weeds are a minor or a potential problem. B Listed Weeds are a more serious problem. T Listed Weeds have been targeted for high priority control.
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