For the grass you can use a grass specific herbicide such as grass b gone ornamec over the top etc.
Broadleaf weed control in liriope.
Department of agriculture hardiness zones 5 through 10.
It also contains a pre emergent preventing new weeds from germinating in your lawn.
Extreme care should be taken to avoid spray contact on the foliage of desired vegetation.
Products applied for burndown of existing vegetation prior to planting and or post directed for weed control around existing ornamental plants.
Will not control broadleaf weeds or sedges.
If the weed is a sedge several applications should greatly reduce the population.
Be careful when using this herbicide around ornamental grasses.
Liriope is in the lily family so will not be affected by the grass herbicide.
Liriope liriope muscari also known as lilyturf is suitable for use as a landscape planting in u s.
Ut extension horticultural specialist carol reese recommends pulling the weeds to get rid of them and then using a pre emergent herbicide like preen to take.
There is not a broadleaf weed killer that you could use that wouldn t also harm the liriope.
The herbicide image kills nutsedge with imazaquin can be used to control sedges and it s safe to use on liriope.
How to kill weeds in liriope.
Weed control in ground covers is based on starting with a weed free bed mulching and the use of preemergence herbicides.
The following is information on weed control in liriope and mondo grass beds from the university of georgia.
Imazaquin can be used on liriope muscari evergreen giant and silvery sunproof for control of some broadleaf and grass weeds as well as sedges and wild garlic pre and postemergence.
Fusilade ii is specifically labeled for use in greenhouses while ornamec is not.
Bonide weed beater complete pre emergent granules.
Many annual and some perennial grasses including torpedograss.
Once weeds emerge in beds postemergence options are somewhat limited expecially for broadleaf weeds.
Try to hand pull or hoe the broadleaf weeds.
For grass weed escapes in lirope beds fenoxaprop clethodim fluazifop p butyl and sethoxydim are labeled for postemergence use for one or more species.
