Skip to content 
Japanese Knotweed Removal Methods Matrix
Key
- £ = lowest cost
- ££££ = highest cost
- Speed: days / weeks / months / seasons
- Use type: Residential / Commercial / Both
- Type: Excavation / Chemical / Biological / Hybrid
- IBG = Insurance-backed guarantee available
1. High-level comparison matrix
| Method | Method type | Suitable for | Speed | Cost | Best for | IBG? | Learn more |
| DART™ | Hybrid (excavation + herbicide) | Residential | Days for excavation + seasonal herbicide | ££ | Cost-effective residential solution when construction is not immediate | Yes | DART™ |
| Resi-Dig-Out™ | Excavation | Residential | Days | £££ | Fast, reliable removal before extensions/landscaping | Yes | Resi-Dig-Out™ |
| Herbicide treatment | Chemical | Residential + commercial (non-disturbance areas) | Multi-season | £ | Long-term control where ground won’t be disturbed | Yes | Herbicide |
| Xtract™ | Excavation (zero-waste) | Commercial | Days | £££ (saves landfill) | Large development sites needing rapid removal | Yes | Xtract™ |
| Stockpile and treat | Excavation + herbicide | Commercial | Months to seasons | ££ | Large phased sites with space for stockpiling | Yes | Stockpile & treat |
| Dig and dump | Excavation + landfill | Both (typically commercial) | Days | ££££ | When no other method is feasible | Yes | Dig & dump |
| Cell burial | Excavation + containment | Commercial | Days | £££ | Large sites with space for a burial cell | Yes | Cell burial |
| Screening | Excavation (soil processing) | Commercial | Days | ££ | Reducing landfill volumes & costs | Yes | Screening |
| Root barriers | Protection | Both | Days | ££ | Protecting boundaries/structures | Yes (if combined with another method) | Root barriers |
| Biological (future tech) | Biological | Not currently mainstream | Multi-season to multi-year | ££ | Long-term suppression (emerging option) | No | Biological |
Quick Links
2. Suitability matrix (Residential vs Commercial)
| Method | Residential | Commercial |
| DART™ | ✔️ | ✖️ |
| Resi-Dig-Out™ | ✔️ | ✖️ |
| Herbicide treatment | ✔️ | ✔️ (non-disturbance only) |
| Xtract™ | ✖️ | ✔️ |
| Stockpile & treat | ✖️ | ✔️ |
| Dig and dump | ✔️ (rarely) | ✔️ |
| Cell burial | ✖️ | ✔️ |
| Screening | ✖️ | ✔️ |
| Root barriers | ✔️ | ✔️ |
| Biological | ✔️ | ✔️ |
3. Timeframe comparison
| Method | Time to completion | Notes |
| Resi-Dig-Out™ | Days | Fastest residential solution |
| DART™ | Days + seasons | Dual-action method |
| Xtract™ | Days | Fastest commercial solution |
| Dig & dump | Days | Very fast but costly |
| Stockpile & treat | Months to seasons | Requires multi-season herbicide |
| Herbicide | 2–5 seasons | Long-term control |
| Cell burial | Days | Requires suitable space |
| Screening | Days | Used with excavation |
| Root barriers | Days | Used as protection |
| Biological | Multi-year | Research/emerging |
4. Cost comparison
(General guide — varies by site size & access)
| Method | Cost level |
| Herbicide | £ |
| DART™ | ££ |
| Screening | ££ |
| Stockpile & treat | ££ |
| Resi-Dig-Out™ | £££ |
| Xtract™ | £££ |
| Cell burial | £££ |
| Dig & dump | ££££ |
5. Environmental impact
| Method | Environmental rating | Notes |
| DART™ | ⭐⭐⭐ | Minimal soil disposal |
| Resi-Dig-Out™ | ⭐⭐ | Soil remains on site |
| Herbicide | ⭐⭐⭐ | Lowest physical impact |
| Xtract™ | ⭐⭐⭐⭐ | Zero-waste technology |
| Stockpile & treat | ⭐⭐ | Soil reused but needs space |
| Dig and dump | ⭐ | High landfill impact |
| Cell burial | ⭐⭐ | Long-term containment |
| Screening | ⭐⭐ | Reduces disposal volumes |
| Root barriers | ⭐⭐⭐ | Preventative not destructive |
| Biological | ⭐⭐⭐⭐ | Long-term sustainable option |
6. Full method list with links
Residential methods
Commercial methods
Emerging or supporting
Accreditations
We have robust systems in place for Environmental and Health & Safety management. Risk assessments are carried out for every aspect of our business to identify situations where harm could be caused. We have an ethos of continuous improvement to eliminate or reduce the risks with detailed working procedures, on-going training and monitoring.
All our staff have health and safety and emergency first aid training. We are also accredited by CHAS and Constructionline and are members of the Property Care Association (PCA).
Start fixing your invasive plant problem today by requesting a survey
Request a survey
Rest assured, where invasive species are identified at an early stage and tackled correctly, problems can usually be avoided. Our specialist consultants complete thorough surveys to identify the extent of the problem. Our plans aren’t one-size-fits-all; they’re customised to tackle the invasive species at your property effectively, taking account of all of your requirements.
GET IN TOUCH
Contact us
Our team of experts is available between 9am and 5:30pm, Monday to Friday to answer your enquiries and advise you on the next steps
Want a survey?
If you already know you have an invasive plant problem, you can request a survey online in less than two minutes by providing a few brief details. A member of the team will swiftly come back to you with further information and our availability.
Need quick plant identification?
Simply upload a few images of your problem plant to our identification form and one of our invasive plant experts will take a look and let you know, free of charge what you are dealing with. We’ll also be there to help with next steps where necessary.