we had some extensive landcaping this year and have scatterings of
liriope through out. we notice that crabgrass has started to
infiltrate our plants with many liriope's taking a direct hit. the
crabgrass will grow right through them often times requiring uprooting
both the weed and plant to separte them. they are quite insidious.
i've read about halts and pre-emergents to control crabgrass. is it
still useful at this stage of the year or are we better off weeding by
hand and starting fresh next year?