I used on an established bed of dwarf mondo grass which is listed as a tolerant landscape ornamental. I did not spray it directly on the mondo just around it and in between. The bed is two years old and was appeared completely healthy. The mondo is dying off now. I did it 2 months ago. It's been looking stressed but now I guess because of the temps its dying off. Where it's brown you can just pull it up easily. Pretty frustrating. As I mentioned in another thread. Thank you JD/Lesco for recommending this. It's my fault but man I thought "what a great resource of knowledge".