Seed Swaps

How can I kill a ground cover called snow-on-the-mountain?

17 Apr 2008

I have this ground cover in my front flower beds all around some boxwood. How can I get rid of it without killing the boxwood? I tried roundup on the leaves and new ones sprouted.




Anything vigorous takes a while to kill. Whether you’re applying roundup or hand-pulling, you’ll have to do it several times to get ‘em all. I don’t know about snow on the mountain, but for many plants (garlic mustard I’m looking at you) you have to repeat over several years as the seed can take years to germinate. A heavy mulch after you’re done may discourage new seedlings too.

Posted on 18 Apr 08 (about 10 years ago)

Try putting cardboard over the top of it and putting mulch on top of the cardboard. It should at least slow it down and make it easier to get at the ones that poke through. Once you have killed it all, then you can remove the mulch and cardboard. I suspect that it will start coming back at that point, but if you are vigilant, you can beat it down before it gets to be too much. Whatever you do, don’t let it go to seed.

Posted on 19 Apr 08 (about 10 years ago)

Well, maybe my cardboard suggestion won’t cut it. I found this link on the web. It sounds like a stubborn plant.

Posted on 19 Apr 08 (about 10 years ago)

Recently I had a pretty determined grape vine. I covered it with well soaked newspaper an inch thick, followed by shredded leaves. After several weeks, I pulled the mulch aside and was easily able to pull up the vine.

There’s a book called Lasagna Gardening that describes basically doing sheet composting. If you use cardboard or really really thick newspaper as the first layer (followed by lots of organic material in layers) it should smother it eventually and you won’t even need to pull it up. Not only will that protect your boxwood from herbicides, but will actually add a ton of fertility to the area. I did this to get rid of all the grass in our front yard. It worked beautifully and now the area is full of the darkest, loosest dirt I’ve ever seen.

Posted on 20 Apr 08 (about 10 years ago)

Boiling water will kill anything. Boil a pot of water and pour it right on the plant and give it a few days. It might take a couple treatments on larger weeds and unwanted plants. If you’re trying to save a nearby plant I would suggest a number of small treatments.

Posted on 21 Apr 08 (about 10 years ago)

Thanks for all the suggestions. I gave it several ‘rounds’ of round up then a layer of newspaper before I mulched. So far so good. This thing has a massive root system so I probably have not seen the last of it but I will keep trying!

Posted on 02 May 08 (about 10 years ago)

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West Jefferson

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