Invasive non-native problem plants

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11
votes
6answers
3k views

How to get rid of Japanese knotweed (hogweed?)

I have Japanese knotweed growing into my garden from an adjoining neighbour's garden. Does anyone please have any advice of how to get rid of this awful plant? I'm in the UK.
10
votes
2answers
668 views

How to deal with invasive Ailanthus (Tree of Heaven)

My neighbors have a great tall Ailanthus (Tree of Heaven). Apparently, before I moved into my house, so did our yard. We now have an enormous stump and a bazillion new shoots that come up from ...
9
votes
3answers
4k views

How can I get rid of mint?

I planted mint in my garden a few years ago and it turned out to be a mistake. I should have grown it in a container. I've been pulling out mint each year but can't get rid of it, so I dug up the ...
9
votes
1answer
576 views

What is this plant found in the UK with green and white leaves with purple flowers?

Any ideas what this plant is and how to control it?
8
votes
1answer
1k views

How do I get rid of houttuynia (heartleaf/lizard tail)?

A previous owner left me with a garden full of Houttuynia cordata (also called hearleaf/lizard tail/chameleon plant), an invasive weed that I've been trying to eradicate. I can't believe it is sold ...
6
votes
3answers
386 views

How do I kill this salt cedar?

The front yard of my New Mexico (USDA zone 7a) house has a salt cedar (Tamarix ramosissima), which is growing like a huge bush. Its salt uptake appears to be preventing anything else in the vicinity ...
3
votes
2answers
123 views

How do I eradicate Mint

I have tried googling with no real answers without destroying the soil. I searched this forum and found this posting answered, but the answer suggests to mow the mint which is not an option for me. I ...
2
votes
1answer
40 views

How should I eradicate or control mugwort without herbicides?

There is an area of approximately 6,000 square feet that is full of mugwort. We would like to restore some native vegetation, but as the area is adjacent to a pond, I don't want to use herbicides in ...
1
vote
1answer
121 views

What is this vine with clusters of black berries, found in Southern Illinois?

I've been working on controlling the edge of my backyard, since it borders a wooded area, and there's a bunch of invasive vines growing everywhere. While I was chopping back some of the underbrush, I ...