Sugar Kelp in Washington
MODERATEOther
Sugar Kelp is currently active in Washington. Watch your susceptible trees closely and act early.
About Sugar Kelp
Description: This observation shows a brown alga with a long, single, undivided blade that is ruffled or crinkled along the edges, giving it a distinctive wavy appearance. The color ranges from yellowish-brown to medium brown. The blade attaches to a smooth, flexible, cylindrical stipe, which in turn is anchored to the rock substrate by a claw-like, profusely branched holdfast. Notes: This sample (SM-0020) is from a private collection that will be donated to the Museum of the North Herbariu
Symptoms to watch for
Treatment options
Consult Extension Service
Contact your local cooperative extension service for diagnosis and site-specific treatment recommendations. Accurate identification is essential before treatment.
Recommended Products & Tools
Helpful supplies for managing Sugar Kelp. Always read and follow label directions, and confirm a diagnosis before treating.
Most tree problems trace back to soil — start here.
Sharp, clean cuts to remove affected wood — a tree-care essential.
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Need help with Sugar Kelp in Washington?
Connect with ISA Certified Arborists serving Washington:
Browse all Washington arborists →Frequently asked questions
Is Sugar Kelp in Washington?
Sugar Kelp is currently active in Washington. Watch your susceptible trees closely and act early. It was first recorded here on June 29, 2026.
What does Sugar Kelp look like?
How do I treat Sugar Kelp?
Options include: Consult Extension Service. Confirm the diagnosis before treating, and consider a certified arborist for high-value trees.