It is suffering from both kinds of oxalis. What product would be safe to use without killing the mondo? It's a tricky one!
23 February 2011 08:28 PM
It is extremely difficult to remove oxalis from mondo grass once it is established. There is no selective herbicide that I can recommend for you to spray on mondo grass. If you are very careful you can paint a solution of Zero Glyphosate onto the leaves of the oxalis, avoiding the blade of the mondo grass. It is rather tedious, but hopefully over a period of time you will eradicate this nuisance weed.