That’s relatively easy, when the stems and growth is above ground. On many occasions where there is a large infestation on the other side of your garden fence, but no plants or stems can be seen in your garden, it would be very fair to say that rhizomes would be present under your garden and a specialist survey would be required to locate these.
The Japanese Knotweed Agency offer a free same day identification service. Just fill out our quick and easy identification form and we’ll let you know if it’s Japanese Knotweed you’re dealing with on your property. Once we’ve checked the information you sent us and the pictures, we can talk you through the next steps and what options might be available to you.
Japanese knotweed isn’t always visible to the naked eye, for example during winter when the plant dies back, or if it’s been herbicide treated in the past it may be lying dormant beneath the ground and could begin to regrow at any moment. Sometimes people try to deliberately conceal Knotweed, for example by laying a patio over it. This would stop the plant growing upwards in that spot, but would tend to push the growth of the plant underground to the left or right and typically closer to the property. You should never hide Japanese Knotweed. It will not go away on its own and the problem will only get bigger.