Invasive Plant & Biomass Waste Disposal

How the works run

1. 1Site assessmentWe assess the extent of the infestation, the volume of arisings and soil, and site constraints on disposal method.
2. 2Method selectionWe recommend on-site burial, root barrier cell burial or off-site landfill transfer based on cost and practicality.
3. 3Excavation & handlingMaterial is excavated, contained and moved without cross-contaminating clean areas or machinery.
4. 4DisposalOn-site burial follows Environment Agency depth and location guidance, or material is consigned to a licensed landfill.
5. 5DocumentationYou receive waste transfer notes or a burial location record for your site file and any future land transaction.

Knotweed arisings are controlled waste

Any soil or plant material containing Japanese knotweed is classified as controlled waste under the Environmental Protection Act 1990, and under the Wildlife and Countryside Act 1981 it is also an offence to cause it to spread in the wild. That means arisings can't simply go in a garden waste bin or be dumped on unused land — they must either be disposed of at a landfill site licensed to accept them, with a waste transfer note as proof, or buried on-site to a method and depth consistent with Environment Agency guidance, using root barrier membrane to prevent regrowth.

Choosing burial over landfill

On-site burial can be considerably cheaper than haulage to landfill, particularly on larger sites, but it isn't a shortcut — it requires the material to be buried at sufficient depth, capped and marked, and recorded on a site plan so future site owners, buyers or their surveyors know exactly where it is. We make that choice with you based on volume, haulage distance, and whether the site is likely to be redeveloped or sold, since undisclosed buried knotweed is one of the most common causes of failed property transactions.

Compliance & accreditation

For how we identify species, price surveys and stand behind our work, see our approach FAQ.