In Washington, you may find a variety of unwelcome guests — common lawn weeds that can frustrate and affect the beauty of your lawn. However, alongside these culprits, there are also noxious weeds in ...

A clump-forming, spreading perennial up to 1.2m tall. The lance-shaped, green leaves have softly-spiny edges and white-felted undersides. In summer, purple-pink spherical flower heads 3-5cm across are ...