Crossposted from the Noxious Weeds blog

Known for its habit of growing up and over 100 ft+ trees and structures, creating carpeted growths in the forest, and housing allergens and rodents, it’s no mystery to PNW locals that common ivy (Hedera helix, AKA English ivy) is an impactful plant. Ivy has been classified as a noxious weed in Washington state since 2002, yet until last month (Aug. 2025) it could be sold and purchased with no legal implications.

So why did it take 23 years to ban common ivy from the market? Let’s get into the weeds (pun absolutely intended). Read more.