top of page
Invasive Plant Species Removal

Invasive plant species can be difficult to control outside of their native environments.  Many of these species have multiple methods of reproduction, and these nonnative species can grow to large monocultures if left unchecked. These invasive species often are allowed to rapidly grow without the competition they would normally face in their their natural native environments, leading them to thrive while inhibiting native plant growth.  Mechanical, cultural, and chemical removal techniques are used to control and eradicate invasive species from project sites.  

HRS is committed to using the least harmful methods for invasive plant removal.  We strive for the most effective results with a minimal impact to the surrounding ecological environment.  Dependent on the plant species population size and other factors, our specialists remove invasive non-native plant species by hand, utilizing small powered machines or with targeted herbicide application.  Our specialists are certified in herbicide application including aquatic application, and are committed to evolving with the best management practices (BMP's) and utilizing tailored application techniques.

Portfolio of Invasive Removal Projects


Examples of Invasive Species Specific to the Pacific Northwest

  • Rubus bifrons (Evergreen blackberry)

  • Hedera helix (English Ivy)

  • Ilex aquifolium (English holly)

  • Polygonum x bohemicum, P. cuspidatum, P. sachalinense, P. polystachyum,  (Japanese knotweed)

  • Iris pseudacorus (Yellow Flag Iris)

  • Spartium junceum (Spanish Broom)

  • Cytisus scoparius (Scotch Broom)

  • Prunus laurocerasus (English Laurel)

  • Crataegus monogyna (English Hawthorne)

  • Alianthus altissima (Tree of Heaven)

  • Buddleia davidii (Butterfly Bush)

  • Senecio jacobaea (Tansy Ragwort)

  • Phalaris arundinacea (Reed Canary Grass)

  • Solanum dulcamara (Bittersweet Nightshade)

  • Rubus armeniacus (Himalayan blackberry)

  • Lamium galeobdolon (Yellow Archangel)

bottom of page