Invasive Exotic Plants are plants introduced to an area by humans
They are also called “noxious weeds” or "alien" plants.
How Bad is the Problem?
They are a serious threat to wild lands
Invasive plants can harm humans, cause crop damage, kill livestock, impede irrigation, as well as altering natural ecosystems.
They can affect fire ecology, water movement, soil erosion, native plants, and wildlife. The weeds do this by drying out wetlands, smothering native trees, poisoning animals, or causing other impacts.
Prevention and Control
Prevention and early detection of invasive plants are the best and cheapest control methods. The more a weed has become established, the more costly and time-intensive it is to stop its spread. Control measures for invasive plants cost the National Park Service millions of dollars every year.
The NPS Exotic Plant Management Team treats invasive plants in Olympic and elsewhere after a complete site assessment and comprehensive park review. They use a control method that fits the particular species and location. The weeds may be controlled by manual pulling or cutting, by herbicides, or by other methods.
If you are starting any home weed removal projects, first contact your local County Noxious Weed Control Board for information and assistance.
Olympic's Worst Invasive Plants:
Want to help us here at Olympic
Report invasive plants in Olympic to the nearest visitor center or ranger station.
Want more information? See Weed Resources.
Last updated: February 28, 2015