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- More Info Don't Plant a Pest Home
Ground Covers
Good news! There are no invasive Ground Covers currently listed for this region.Ornamental Grasses
Good news! There are no invasive Ornamental Grasses currently listed for this region.Invasive Shrubs of the Northeast
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Sesbania punicea (wisterias)
Sesbania punicea scarlet Wisteria; red Sesbania; rattlebox; Chinese WisteriaNew to California, spreading along the American River in central California. Also found in the Delta and in northern California. A serious problem in South Africa and Florida. Grows and spreads rapidly along river and stream corridors. Pushing out native vegetation and wildlife. Seeds are moved by washing downstream or are carried by birds.
Invasive: Do Not Plant
Palms
Good news! There are no invasive Palms currently listed for this region.Invasive Trees of the Northeast
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Myoporum (false sandalwood)
Myoporum laetum ngaio tree; false sandalwood; mousehole treeInvades along the coast from Sonoma County to San Diego. Forms dense stands with no other vegetation. Can cover large areas. Spread by birds. Leaves and fruits are toxic to wildlife and livestock. Burns easily. Doesn't typically spread in interior areas.
Invasive: Do Not Plant -
Schinus spp (pepper trees)
Schinus terebinthifolia Brazilian pepper tree; Christmas-berry tree; Christmasberry; Florida hollySchinus molle Peruvian peppertree; California peppertreePepper trees are native to South America (despite the fact that Peruvian peppertree is sometimes called California peppertree). Seeds are transported by birds and mammals into natural areas. The aggressive growth of peppers enables them to displace native trees and form dense thickets in natural areas. They produce undesirable suckering and sprout unwanted seedlings. A serious problem in southern California. Less of a problem in the San Francisco Bay Area and Central Valley, but care should be taken if planting near wildlands.
Invasive: Do Not Plant -
Ailanthus (tree of heaven)
Ailanthus altissima tree-of-heaven; Chinese sumac; paradise-tree; copal-treeAlthough not commonly sold in nurseries, this tree is sometimes "shared" among gardeners. Tree-of-heaven produces abundant root sprouts that create dense thickets and displace native vegetation. These root sprouts can be produced as far as 50 feet away from the parent tree. In California, it is most abundant along the coast and Sierra foothills, as well as along streams. A single tree can produce up to a million seeds per year.
Invasive: Do Not Plant -
Eucalyptus globulus
Eucalyptus globulus blue gum; Tasmanian blue gum; blue gum Eucalyptus; common Eucalyptus; Southern blue gum; Victorian blue gumFound along the coast from Humboldt to San Diego and in the Central Valley. Most invasive in coastal locations. Easily invades native plant communities, causing declines in native plant and animal populations. Fire departments throughout Southern California recommend against using eucalyptus trees for landscaping because they are extremely flammable.
Invasive: Do Not Plant -
Elaeagnus angustifolia (Russian olive)
Elaeagnus angustifolia Russian olive; oleasterFound throughout California. Able to spread long distances with the help of birds and mammals. Invades river and stream corridors, pushing out native willows and cottonwoods. Reduces water levels. Provides poor wildlife habitat. Serious invader in other western states.
Invasive: Do Not Plant -
Tamarix (saltcedar)
Tamarix aphylla athel; athel pine; tamarisk; evergreen saltcedarTamarix parviflora smallflower tamariskTamarix ramosissima saltcedar; tamariskA serious invader throughout California and southwestern states. Uses excessive amounts of water, increases soil salinity, changes water courses. Diminishes wildlife habitat, and increases fire hazard. Not commonly sold but still occasionally available.
Invasive: Do Not Plant -
Crataegus monogyna
Crataegus monogyna English hawthorn; common hawthorn; oneseed hawthorn; May tree; singleseed hawthorn; azzarola; neapolitan medlar; oneseed hawthorn; whitethorn;An established invader of the Pacific Northwest, now spreading through northern California. Capable of long-range dispersal by birds. Creates dense thickets, changing the structure of woodland understories. May hybridize with and threaten native hawthorn species.
Invasive: Do Not Plant
Recommended Trees for the Northeast
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Tristaniopsis laurina
Formal plant; can be trained as a single or multistemmed tree. Mahogany-colored bark peels, revealing new, satiny white bark beneath. Yellow flowers produce a good show. Can be slow-growing. Damaged by very cold winters. Try cultivar 'Elegant'. Evergreen. Zones: 15-24. Height: To 45 ft. Width: 5-30 ft.
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Quercus macrocarpa
Rugged-looking tree with flaky grayish bark. Long, deeply-lobed leaves are glossy green. Large, distinctive acorns covered in fringed cap. Tolerant of poor conditions. Acorns can be a trip hazard. Deciduous. Zones: 1-11, 14-23. Height: 60-75 ft., equally wide when mature.
Sun:Water: -
Styrax japonicus
Slender, graceful trunk. Broad crown. Leaves may turn red or yellow in fall. Delicate, fragrant, white flowers hang below leaves, creating a layered effect. Deciduous. Zones: 4-9, 14-21. Height: 30 ft., narrow in youth, wide in maturity.
Sun:Water: -
Taxodium distichum
Delicate, feathery foliage sprays turn reddish-brown before dropping in the fall. Tolerates drought or very wet conditions, and any but the most alkaline soil. Trunk can be buttressed at the base. No pests or diseases. Easy to plant and care for. Tolerates any amount of water. Deciduous. Zones: 2-10, 12-24. Height: 50-70 ft. Width: 20-30 ft.
Sun:Water: -
Michelia doltsopa
Prune to create a narrow, upright tree. Furry brown buds open to cream or white blossoms. Thin, leathery, dark green leaves are red underneath. Evergreen. Zones 15-24. Height: To 25 ft.
Sun:Water: -
Liriodendron tulipifera
Straight, columnar trunk with a tall, pyramidal crown. Unique lyre-shaped leaves. Foliage starts bright green, turns bright yellow in fall. Tulip-shaped flowers in late spring are interesting but not showy. Beautiful large shade or lawn tree. Likes slightly acidic, well-drained soil and plenty of room. Deciduous. Zones: 2-12, 14-24. Height: 60-80 ft. Width: To 40 ft.
Sun:Water: -
Metasequoia glyptostroboides
Soft, pale green needles turn reddish-brown before falling in autumn, leaving a beautiful winter silhouette. Grows very fast when young. Older trees have fluted trunks. Resistant to oak root fungus. Not suitable for very arid regions or the coast. Deciduous. Zones: 3-10, 14-24. Height: To 90 ft. Width: To 20 ft.
Sun:Water: -
Elaeocarpus decipiens
New leaves rusty and hairy, turning smooth and bright green. Old leaves turn red before dropping. Blooms with tiny, scented, white flowers in clusters followed by small, blue-black, edible fruits. Likes rich, well-drained soil. Needs little pruning. Evergreen. Zones: 8-9, 14-24. Height: 30-60 ft. Width: 20-30 ft.
Sun:Water: -
Eriobotrya deflexa
Fast-growing and easily trained. New leaves emerge bright copper before turning green. Bunches of creamy white flowers in spring. Easy to plant and care for. Requires well-drained soil. Can be subject to fireblight. Evergreen. Zones: 8-24. Height: 12-30 ft. Width: 15-30 ft.
Sun:Water: -
Eucalyptus nicholii
One of the cleanest, most graceful eucalyptus, with weeping branches and not too much litter. Crushed leaves smell a bit like peppermint. Furrowed, rich, reddish-brown bark. Damaged by very cold winters. Evergreen. Zones: 5, 6, 8-24. Height: 36-48 ft. Width: 15-36 ft.
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Chionanthus retusus
Blooms like clouds of the whitest, feathery flowers. Handsome bark provides winter interest. Will grow in most central California environments. The olive-like fruits can be a litter problem. May produce a significant amount of pollen. Deciduous. Zones: 3-9, 14-24. Height: To 20 ft., not quite as wide.
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Invasive Aquatic Plants of the Northeast
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Eichhornia crassipes (water hyacinth)
Eichhornia crassipes water hyacinthReputed to be the fastest-growing plant in the world! Can double in size in a week during hot weather. Forms dense mats that impede water flow. Seeds can live 15-20 years. The State of California has spent $45 million over 15 years to control water hyacinth in the Sacramento-San Joaquin Delta.
Invasive: Do Not Plant -
Hydrilla verticillata (water thyme)
Hydrilla verticillata Hydrilla; water thyme; Florida ElodeaIllegal to sell or possess in California. Has arrived in California mixed with shipments of water lilies and as a mislabeled aquatic plant. Fragments quickly start new colonies.
Invasive: Do Not Plant -
Lythrum salicaria (purple loosestrife)
Lythrum salicaria purple loosestrifeInvades streambanks and wetlands throughout the U.S. Persists year to year from root buds and from the root crown. Although not commonly sold in California, this plant is available for purchase on the internet. One plant can produce 2.7 million seeds. Has the potential to infest rice fields.
Invasive: Do Not Plant -
Ludwigia (waterprimrose)
Ludwigia hexapetala creeping waterprimrose; Uruguay waterprimroseLudwigia peploides floating water primrose; California waterprimroseCrowds out native plants and reduces water quality. Dense mats slow water movement and create habitat for mosquito larva, which can carry West Nile virus. Although there are native Ludwigia, do not collect them from the wild.
Invasive: Do Not Plant -
Iris pseudacorus (yellowflag iris)
Iris pseudacorus yellowflag Iris; pale yellow IrisForms colonies along streambanks. Listed as a noxious weed in Nevada, Expanding in the Pacific Northwest. Uncommon in California, but causes serious problems in other regions with similar climates.
Invasive: Do Not Plant -
Salvinia molesta (giant salvinia)
Salvinia molesta giant Salvinia; karibaweed; water velvet; African pyle; aquarium watermoss; water fern; koi kandyIllegal to sell in the US. Floating mats up to 3 ft. thick reduce light and dissolved oxygen in the water so that few living things can survive. Common salvinia (Salvinia minima) may be sold, but species are difficult to tell apart.
Invasive: Do Not Plant -
Egeria densa
Egeria densa Brazilian Egeria; EgeriaInfests 7000 acres in the Sacramento-San Joaquin Delta. Aggressively invades natural waterways, displacing native aquatic plants and forming dense mats that impede water flow.
Invasive: Do Not Plant -
Myriophyllum spicatum (spike watermilfoil)
Myriophyllum spicatum spike watermilfoil, Eurasian watermilfoilThe most widespread submerged invasive aquatic plant in California and a serious problem in Lake Tahoe. Stems are brittle and break easily, starting new infestations when spread by boats or water birds.
Invasive: Do Not Plant -
Myriophyllum aquaticum (watermilfoil)
Myriophyllum aquaticum parrotfeather; Brazilian watermilfoil; parrotfeather watermilfoil; thread-of-life;Forms dense mats that impede water flow. Stems are brittle and break easily. Spread by boats or migrating water birds. Uncommon in California but has the potential to spread.
Invasive: Do Not Plant -
Arundo (aquatic)
Arundo donax giant reedA serious problem in coastal streams. Dense growth damages habitat, while creating a fire and flood hazard. Variegated varieties are also problematic and are not recommended.
Invasive: Do Not Plant
Recommended Aquatic Plants for the Northeast
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Sagittaria spp.
Sagittaria latifolia arrowheadSagittaria montevidensis arrowheadSagittaria lancifolia white swan, red swanPond Margin or Bog . Striking arrow-shaped leaves and white flowers. Grows in moist soil or water 6 inches or more deep. S. latifolia grows 12 to 20 inches; S. montevidensis to 4 feet. Also try S. lancifolia (white swan or red swan) for a specimen plant with green or red stems and a 7-foot flower spike.
Sun:Water:Northeast native -
Mimulus aquatics
Mimulus guttatus common yellow monkeyflowerPond Margin or Bog. Annual or perennial. Fills out a 4 feet x 4 feet space in spring and summer. May die back then return the next year. Yellow flowers with reddish spots resemble snapdragons. Hummingbirds like it; deer don't. Also try M. cardinalis for red flowers.
Sun:Water:Northeast native -
Nuphar polysepalum
Nuphar polysepala yellow pondlilyFloating or Rooted Emergent Plants. A native plant with a dramatic yellow flower and round leaves up to a foot in diameter. Foliage is submerged in winter and emerges in spring. May take more effort to find for sale.
Sun:Water:Northeast native -
Polygonum amphibium
Polygonum amphibium var. stipulaceum water smartweedSubmerged Plants. A versatile, creeping plant that does well in water depths ranging from moist soil to 4 feet of water over the crown. Long, narrow, floating leaves, and bright-pink flowers.
Sun:Water:Northeast native -
Pontedaria cordata
Pontedaria cordata pickerel weedPond Margins. Heart-shaped leaves surround dramatic flower spikes. Excellent filtration ability. Place in containers in 1 foot of water. 3 to 4 feet tall, 2 to 2 1/2 feet wide.
Sun:Water:Northeast native -
Iris ensata
Iris ensata 'Variegata' Japanese irisPond Margin or Bog
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Iris laevigata
Iris laevigata and cultivars laevigata irisPond Margin or Bog. A true water-loving iris that will do well in 6 inches of water. Flowers in white, purple, lavender, and pink. Yellow-blooming varieties are available, but rare. Leaves to 18 inches tall.
Sun:Water: -
Iris missouriensis
Iris missouriensis, I. longipetala western blue flag irisPond Margins. A native iris with flowers ranging from white to blue to lavender. Leaves to 2 feet tall. Likes open, sunny, moist areas. Smaller in scale than yellowflag iris.
Sun:Water:Northeast native -
Iris sibirica
Iris sibirica and hybrids Siberian irisPond Margin or Bog.
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Juncus effusus
Juncus effusus common rushSun:Water:Northeast native -
Ligularia wilsoniana
Ligularia wilsoniana Wilson's ligulariaPond Margin or Bog. A tall and showy wetland perennial with spikes of bright yellow, daisy-like flowers. Stems grow to six feet tall.
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Lobelia spp
Lobelia cardinalis lobeliaLobelia fulgens lobeliaLobelia siphilica lobeliaPond Margin Plants. A spectacular blooming bog plant. Tubular flowers resemble honeysuckle or salvia and attract hummingbirds. L. cardinalis and L. fulgens to 6 feet with red flowers; L. siphilica grows 2 to 3 feet with blue flowers.
Sun:Water:Northeast native -
Lysochiton americanum
Lysochiton americanum yellow skunk cabbagePond Margin or Bog
Sun:Water:Northeast native -
Marsilea spp.
Marsilea spp. water cloverFloating or Rooted Emergent Plants.
Sun:Water:Northeast native -
Elodea canadensis
Elodea canadensis waterweedSubmerged Plants. One of the best oxygenating plants. Has dark green leaves and provides food and shelter for fish. Dies back in winter. Grows best in fine sand but may need to be controlled in small ponds. (Sometimes also sold under the name anacharis.)
Sun:Water:Northeast native -
Brasenia schreberi
Brasenia schreberi watershieldFloating or Rooted Emergent Plants.
Sun:Water:Northeast native -
Ceratophyllum demersum
Ceratophyllum demersum coontailSubmerged Plants. A rootless, deciduous perennial with slender stems and forked leaves. Tolerates shade and hard water. Good oxygenator.
Sun:Water:Northeast native -
Chondropetalum aquatics
Chondropetalum tectorum Cape thatching reedSun:Water: -
Cornus sericea
Cornus sericea redtwig dogwoodCornus sericea 'Flaviramea' yellowtwig dogwoodPond Margin or Bog. Brilliant red or yellow foliage and colorful winter twigs. Provide good screens where water is present. to 8 feet tall and 10 feet wide. Cut roots to control spread.
Sun:Water:Northeast native -
Alisma plantago-aquatica
Alisma plantago-aquatica common waterplantainPond Margin or Bog. Herbaceous perennial with flowers heads arranged in whorls of white, pink, or lavender. Blooms form a pyramid-like shape. Suitable for medium to large ponds, but may overwhelm a small one. 12 to 36 inches tall and up to 18 inches spread.
Sun:Water:Northeast native -
Aponogeton distachyon
Aponogeton distachyon cape pondweedFloating or Rooted Emergent Plants. Crisp white flowers with a vanilla scent are held on the water surface. Prefers cool water. May overwhelm a small pond.
Sun:Water: -
Azolla filiculoides
Azolla filiculoides Pacific mosquito fern, fairy fernFloating or Rooted Emergent Plants. Tiny, free-floating perennial fern. Excellent pond cover for fish and other wildlife. Turns reddish-purple in the fall. To 1/2 inch high, with a spreading habit. May overwhelm a small pond.
Sun:Water:Northeast native -
Baccharis salicifolia
Baccharis salicifolia mulefatPond Margin or Bog.
Sun:Water:Northeast native -
Bambusa aquatics
Bambusa multiplex 'Alphonso-Karr' 'Alphonso-Karr' bambooBambusa multiplex 'Golden Goddess' 'Golden Goddess' bambooBambusa multiplex bamboo (clumping species only)Pond Margin or Bog. Useful as a hedge or screen. Rhizomes of clumping species stay close to the plant and will not invade surrounding soil. Height varies by cultivar, up to 35 feet. Do not plant running bamboos, which spread aggressively.
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