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Japanese Knotweed
Knotweed is a highly invasive, non-native species.

Each area is different, and I will need to drop by to see how easy it will be to remove.
I do this by injecting liquid glyphosate directly into the stem
This kills the plant in one shot. A followup visit will come a month after.

Take note! Removal of knotweed from a site without a licence is a criminal offence.
The plant and the soil it grows in is classified as Hazardous Waste.
Direct Stem Injection solves this problem by killing the weed in situ
While I make every effort to be organic, a translocated poison is the only effective way of killing this awful plant.
The water-based poison I use is confined directly inside the plant, lasts only 2 months in the soil
and does NOT end up all over your garden.

NEVER spray organophospates! Injection only!

If you have Japanese Knotweed, it can become tricky to buy, sell or let a house.
In this situation, you would require an Environmental Management Strategy (EMS),
to prove to lenders that you recognise the problem and are dealing with it.
I'll can put together an EMS specifically for you, so not only is the plant dealt with, but also any solicitors!

N.B. Knotweed is not the only invasive I can deal with, I also kill Giant Hogweed, Ragwort and Himalayan Balsam.

About Knotweed

Image courtesy of the Royal Horticultural Society

All the facts about this notorious weed

It starts growing in spring, and it rapidly grows into a large bush up to and over 2m high
It can easily push its roots through brickwork, concrete and tarmac. Nothing in England eats it. .
It has broad spade-shaped leaves that grow alternately up a hollow green/purple stem,
rather nice white flowers that produce no seeds.

Knotweed spreads via the root.
Normally, a plant like this could just be dug up, but knotweed stems are notorious for being able to regenerate
The plant is brittle and snaps apart easily, a small piece of root or stem can re establish itself
and rapidly develop back into a full bush.

For example, a fingernail-sized piece of root, placed in a petri dish, will regrow into a full plant in 8-12 weeks

Because of this, soil that Japanese Knotweed has grown
in is counted as hazardous waste, and disposing of it is tricky
Specialist licences are required to remove and transport contaminated land
(under the Wildlife and Countryside Act 1981)

Check out what the Government has to say about Knotweed.

The Royal Horticultural Society has some links too.

Or check out the Environment Agencies Knotweed Code of Practice (PDF)