Is it safe to use pre emergent crabgrass herbicide on liriope to control still grass
Baltimore County Maryland
Check the label on the product you buy, but generally it should be fine. Liriope is not a grass and does not spread by seed usually. Pre-emergent herbicides prevent seeds from sprouting.
Stiltgrass seeds lie dormant over the winter and germinate in spring. Put down your pre-emergent herbicide in spring about a week before you would put it down for crabgrass.