Tansy Ragwort Removal in Vancouver WA: What to Do After a County Letter

Why Clark County Sent You a Tansy Ragwort Letter

If a Clark County noxious weed letter naming tansy ragwort showed up in your mailbox this spring, you are not alone. The county mails hundreds every year to property owners with the bright yellow weed flowering along driveways, fence lines, and pasture edges. Here is how Vancouver WA homeowners should handle tansy ragwort removal in Vancouver WA before the deadline on the letter passes.

What Tansy Ragwort Looks Like

Tansy ragwort (Jacobaea vulgaris) is a Class B noxious weed in Washington. It grows 2 to 5 feet tall, with deeply lobed dark green leaves and dense clusters of small yellow daisy-like flowers. Each plant can produce up to 150,000 seeds that stay viable in soil for years.

Tansy ragwort (Jacobaea vulgaris) showing the bright yellow flower clusters and lobed leaves Clark County inspectors look for. Photo: Wikimedia Commons, public domain.

Common tansy and St. John's wort look similar, but tansy ragwort has 13 yellow ray petals around a yellow disk while common tansy has button-like flowers with no petals. The Washington Noxious Weed Control Board page has more reference photos.

Why You Cannot Just Mow It

The most common mistake after getting the letter is mowing. Mowing tansy ragwort makes it worse. Cut plants resprout, broken stems still set seed, and the mower scatters thousands of seeds across the area you just cleared. It is the same lesson as ignoring clogged gutters that get worse every season: surface fixes do not address the root cause, so the problem returns bigger next time.

How to Remove Tansy Ragwort Properly

For small patches, hand-pulling works if you do it right:

• Pull before flowering, late spring through early summer while soil is still soft.
• Wear gloves and long sleeves. Tansy ragwort contains toxins that irritate skin and harm livestock.
• Get the entire root. Use a garden fork or weed wrench. Leftover root fragments resprout.
• Bag in heavy trash bags. Do not compost. Seeds survive backyard compost piles. Send to landfill.
• Reseed bare soil immediately with grass or dense ground cover, or convert the spot to hardscape like a paver path or gravel border so the seed bank cannot germinate.

When to Call a Professional

Hand-pulling works for a few plants. Patches larger than a small garden bed, infestations along ditches and slopes, or properties with multiple noxious weed species become a multi-weekend project that often misses enough plants to keep the cycle going.

Our brush clearing crew handles tansy ragwort removal across Clark County, including the bag-and-haul step that keeps seeds out of your soil. We follow disposal guidance from the Clark County Noxious Weed Management program so you stay in compliance.

If tansy ragwort is one of several yard issues, our broader landscaping service can pair removal with reseeding, mulching, and ongoing maintenance so the patch does not return next spring. Tying it into a year-round plan, like our 2026 home maintenance checklist, is the cheapest way to stay ahead.

Do Not Wait for a Re-Inspection

Clark County letters typically give a few weeks to comply. If the inspector returns and the patch is still flowering, the county can perform the work and bill you on top of formal violation. Contact All Seasons for a free estimate and clear your property before the deadline.