Knotweed & Invasive
Management
Multi-year eradication programs paired with licensed landscape architecture and regulatory wetland permitting across Rhode Island and Massachusetts.
Targeted Species Control
Dedicated Knotweed Eradication in RI & MA
Knotweed is an aggressive, destructive perennial that rapidly devalues properties, damages hardscapes, and compromises local ecosystems across Rhode Island and Massachusetts.
Generic removal contractors often attempt single-treatment cutting or digging, which actually stimulates deeper rhizome expansion. True eradication requires a scientifically timed, multi-season strategy tailored specifically to New England’s coastal and wetland environments.
"We don't just clear weeds—we engineer multi-year biological protocols that guarantee total property restoration."
Systematic Protocols
Our Multi-Year Eradication Program
Invasive management requires sustained execution. Our phased approach guarantees eradication while protecting your soil and surrounding landscape value.
Site Assessment
Topographical mapping, rhizome depth evaluation, infestation density analysis, and wetland boundary checks.
Cut & Spray Treatment
Targeted mechanical reduction paired with seasonally timed systemic treatments to starve root systems.
Guarantee & Rescan Year
Follow-up site surveys, spot treatments, and long-term control monitoring to ensure zero resurgence.
Optional Native Replanting
Ecological restoration using premium native species that fortify soil health and prevent future invasive takeover.
The Cavanagh Advantage
Wetland Permitting + Landscape Architecture
Because Knotweed thrives near water, most sites fall directly within protected wetland buffer zones. Unlike typical removal outfits, we manage the entire legal and ecological process.
MA Conservation & RI CRMC Permitting
We handle all environmental regulatory filings, Notice of Intent (NOI) submissions, and buffer zone compliance required by local conservation commissions.
Bespoke Architectural Integration
As licensed landscape architects, we ensure that post-removal areas seamlessly integrate with your property's master architectural design.
Request A Knotweed Assessment
Complete the details below to receive a site evaluation and multi-year program estimate for your property.