Hello, I am wondering if Round Up or other similar non selective herbicides
will kill St. Augustine and/or Centipede grasses when they are in dormance
during the winter. To extend the question, how do these herbicides work
exactly? If they are only absoarbed via the leaves, then it seems that
maybe the dormant grass leaves would not absoarb the herbicide. Any
insight into this is appreciated. Thank you.

JB