Will roundup kill snow on the mountain? It is becoming a problem in my hosta garden. If I carefully brush the snow on the mountain leaves with roundup, will it kill the roots? or, is it my best bed to put black plastic down.
Early new spring growth is the best way and time to treat with a herbicide.
This article has more information.
https://www.gardeningknowhow.com/ornamental/groundcover/snow-on-the-mountain/snow-on-the-mountain-plant.htm
Can snow on the mountain be transplanted in clumps instead of one by one.
Yes. This is the most effective, and best way to transplant these, as large divisions.
This article will offer further care on these: https://www.gardeningknowhow.com/ornamental/groundcover/snow-on-the-mountain/snow-on-the-mountain-plant.htm
I had one Snow on the Mountain plant suddenly show up in my yard this summer. Can I propogate it from cuttings?
I'm not sure if you have the low-growing groundcover, also called bishop's weed (Ageopodium podograria) or the tall native plant that has white variegation with clusters of flowers along the stems (Euphorbia marginata).
Both can be invasive and quite vigorous.
The ground cover increases by underground rhizomes. The tall one reseeds easily. But both would probably root by stem cuttings as well.
My garden area gets morning sun with afternoon shade it's beside our home.
There are a couple of plants referred to as snow on the mountain and I've included information on both. If you have the euphorbia, it is an annual that reseeds and the new plants next year will probably look normal.
The one also called Bishop's Weed is hardy to zone 3 and is a groundcover. You can pinch out the green ones, which will take over if you don't.
http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=280105
https://www.gardeningknowhow.com/ornamental/groundcover/snow-on-the-mountain/bishops-weed-reversion.htm
I bought a house with a large garden filled with snow on the mountain and peppermint. What is the best technique in getting rid of both of these weeds and what time of year? Is there an issue with doing it in August rather than the spring?
The question isn't when or how... It is IF!!!
Both of these are highly invasive and will spread by underground roots AND seeds.
You can try a few things, though.
The first thing to try will be boiling water. My method entails pouring boiling water on the area once a day for a few days. This will, usually, do the trick. Here is an article that will help:
https://www.gardeningknowhow.com/plant-problems/weeds/boiling-water-and-plants.htm
Solarizing soil will be the next thing to try. Here is an article to help you with that:
Last, will be chemical means. You can use your broad spectrum herbicide of choice. This is my least preferred option.
Will it come back in spring?
The recommended planting season for this plant, also known as Bishop's Weed, is spring or fall. If you get an early frost in your area, you may need to protect the new plants until they get established. If they survive your winter, they will definitely come back in the spring.
Here's an article for you: https://www.gardeningknowhow.com/ornamental/groundcover/snow-on-the-mountain/snow-on-the-mountain-plant.htm
I cherish my Snow on the Mountain, this year it came up in my garden, thinking it might be from a Kale strayed seed, I plucked a leaf and ate it, 2 days later I ate another one. Thought the texture and taste would be good for salad. It was not bitter as Kale is or blah as spinach. I have 3 kinds of Kale in the back by the fence, now all is self seeding, so it was a possibility. Snow on the Mountain takes over when most of Calendulas are pulled out, reseeds itself also. Seeds from my Mother in Law.
Yes, it has low severity toxicity that can cause vomiting and diarrhea. There are several plants called snow-on-the-mountain. The toxic one is Euphorbia marginata.
Another one called bishop's weed (Aegopodium podagraria) is not poisonous.