Invasive Plants found on Mercer Island

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 Be a good  neighbor!  Please remove any of these invasive, non-native plants that occur on your property.   A large infestation of invasive, non-native plants will reduce you property values.  They also spread to your neighbors and to Mercer Island Parks and Open Spaces. 
English ivy Hedera helix
Himalayan blackberry Rubus discolor
English holly Ilex aquifolium
English/cherry laurel Prunus laurocerasus
Old man's beard/clematis Clematis vitalba
knotweed Polygonum cuspidatum
Scots broom Cytisus scoparius
herb Robert Geranium robertianum
field bindweed Convolvulus arvense
creeping buttercup Ranunculus repens
reed canarygrass Phalaris arundinacea
giant hogweed Heracleum mantegazzianum
bittersweet nightshade Solanum dulcamera
poison hemlock Conium maculatum
evergreen blackberry Rubus laciniatus
butterfly bush Buddleia spp.
policeman's helmet Impatiens glandulifera