Is there an herbicide that kills weeds in monkey grass?

It all depends on what weeds you want to kill. If it is a grassy weed you can spray a grass killer like grass-be-gone, Fusilade, and Poast. If the weeds are broadleaf that creates more of a challenge. Monkey grass is in the lily family and is a broadleaf itself. Spraying a broad-leaf herbicide will kill the monkey grass. Image herbicide will kill some broadleaf weeds but not affect the monkey grass. You may just need to manually pull the weeds you can’t kill.

Related Videos:
Three Common Herbicides
Controlling Weeds
How do I get rid of vinca minor growing in monkey grass?

Related Resources:
Controlling Weeds in Liriope and Mondo Grass Beds
Common Herbicides for Ornamental Weed Control