Scotch Broom

Scotch broom is in full bloom throughout the county, which gets people thinking, “Why isn’t anyone doing anything about it?” Scotch broom is on the Oregon Dept. of Agriculture’s noxious weed “B” list. This means that it is regionally abundant and a statewide management plan is not feasible. Basically, it is not a priority for control in our area. If you would like to tackle scotch broom yourself, there are several options. Click on the following links to find out more.

https://pnwhandbooks.org/weed/problem-weeds/broom-scotch-cytisus-scoparius-french-genista-monspessulana-portuguese-cytisus

https://www.nwcb.wa.gov/weeds/scotch-broom

 

Garlic Mustard

Garlic mustard is a biennial plant growing a basal rosette the first year, and a flowering stalk the second year. Flowers are small and white with 4 petals. When crushed, the leaves smell like garlic. This invader can grow in shade or sun and is a prolific seed producer. Seeds can be easily spread on boots, vehicles, animals and water. Garlic mustard grows successfully in a variety of conditions and soil types, easily outcompeting native vegetation. Control methods include both hand pulling and herbicide application. If pulling by hand, be sure to get all of the root. Plants should be bagged and discarded in the trash or landfill. Be sure to clean your boots and clothing well to avoid spreading seeds. After removing or spraying garlic mustard, you can mulch or re-seed the site with a fast-growing grass seed mix. Continue to monitor the area for new plants for several years. Please let us know if you find garlic mustard in Clatsop County.

 

New Invader – Orange Hawkweed

Orange hawkweed (Hieracium auranticum) has been recently reported in Clatsop County. New to the county, this very aggressive and non-palatable noxious weed can quickly spread into native habitat, lawns, and pastures. Be on the lookout for this showy weed, because if left untreated, it can form dense monocultures that displace other vegetation. Please report sightings to our office and at this link: https://oregoninvasiveshotline.org/. For more information on identification and impact, check out this resource from the Oregon Department of Agriculture: orange hawkweed