Landowners struggling to fight invasive knotweed on their property know that this tall green menace is not an average garden pest. Often called false bamboo, knotweed grows rapidly in late spring and is conspicuous along many rivers and roadways, and in backyards and parks throughout the county.

To help landowners combat knotweed on their property, King County’s Noxious Weed Program is offering free workshops on safe and effective control methods that can work for different situations.

he classes are scheduled for:

10 a.m. to 1 p.m., June 22, Cedar Grange, 22531 Southeast 218th Street, Maple Valley

6:30-9 p.m., June 25, Green River Community College, Lindbloom Student Center, Glacier Room, 12401 Southeast 320th Street, Auburn

6:30-8:30 p.m., July 9, Meadowbrook Farm, 1711 Boalch Avenue, North Bend

6:30-8:30 p.m., July 16 Kingsgate Library, 12315 Northeast 143rd Street, Kirkland

To sign up for a class or for more information, visit www.kingcounty.gov/weeds or call the noxious weed program at 206-296-0290.