Japanese Knotweed Removal on South Vancouver Island

Japanese knotweed (Fallopia japonica) is one of the most destructive invasive plants in the world. It spreads rapidly through rhizomes, damages infrastructure, and is nearly impossible to remove without expert help. Once established, it can devalue property, overwhelm native ecosystems, and even grow through concrete, pavement, and foundations.

At Ascent Yard Care, we provide professional, permanent knotweed removal across South Vancouver Island. We are the largest invasive plant removal company on Vancouver Island, trusted by homeowners, developers, and municipalities for high-risk, high-stakes removals that demand precision, experience, and long-term results.

Why Japanese Knotweed Is a Serious Threat

Knotweed spreads through its extensive underground rhizome network, which can grow several meters deep and over 10 metres horizontally. Cutting or mowing it often makes things worse—stimulating more aggressive growth.

Knotweed is a major problem because it:

• Damages infrastructure – It can crack asphalt, break through retaining walls, and infiltrate building foundations
• Devalues property – Its presence can halt real estate sales, renovations, and financing
• Outcompetes native plants – It grows rapidly and forms dense stands that kill surrounding vegetation
• Spreads easily – Even small root fragments can regenerate a full plant
• Is legally regulated – In many jurisdictions, you may be required to report or control knotweed infestations

Early, professional intervention is critical. The longer knotweed is left unchecked, the more expensive and difficult it becomes to remove.

Ascent’s Professional Knotweed Removal Process

Knotweed removal is not a standard landscaping job—it requires expert strategy, proper containment, and long-term monitoring. Our team has successfully removed knotweed from residential lots, streambanks, parks, roadways, and large construction sites.

1. Site Inspection & Mapping

We begin by surveying the site to determine the extent of the infestation, including surface growth and likely underground spread. This data allows us to build a detailed removal plan based on the size, location, and soil conditions.

2. Containment & Excavation

We carefully excavate all visible plant matter and rhizomes, often to depths of 1–2 meters. Excavated soil may be quarantined or disposed of off-site, depending on the severity and land use goals. We take every precaution to prevent fragment spread during removal.

3. Licensed Herbicide Treatment

For infestations near buildings, in sensitive ecosystems, or where excavation isn’t practical, we use targeted herbicide applications administered by certified professionals. This is often the most effective method for full rhizome eradication over multiple growing seasons.

4. Monitoring & Restoration

Knotweed requires multi-year monitoring to ensure complete elimination. We offer follow-up visits and can assist with replanting native vegetation or installing root barrier systems to prevent reestablishment.

Why South Vancouver Island Chooses Ascent Yard Care

We are Vancouver Island’s most experienced and capable knotweed removal company, with a reputation built on professionalism, safety, and permanent results.

Why clients trust Ascent:

• Permanent eradication, not just temporary trimming
• Certified herbicide applicators and WCB-covered field crews
• Excavation and containment expertise for high-risk areas
• Regulation-compliant disposal and reporting
• Experience with developers, municipalities, and private landowners
• Responsive service and clear communication

Whether you’re managing a construction site, a waterfront property, or a backyard infestation, we bring the scale, skill, and precision required to handle knotweed properly.

Areas We Serve

We offer Japanese knotweed removal throughout South Vancouver Island, including:

• Victoria
• Oak Bay
• Saanich
• Esquimalt
• Langford
• Metchosin
• Highlands
• Sooke
• Mill Bay
• Cobble Hill
• Shawnigan Lake
• Cowichan Valley
• Gulf Islands (by request)

Request a Free, No-Obligation Quote Today

If you suspect Japanese knotweed on your property, don’t wait—early intervention is key. Call Vancouver Island’s leading invasive species removal specialists today.