Does Weed Killer Affect Flowers

Q:  Is Weed-B-Gon a contact spray or do I have to worry about the fumes killing my flowers?  Julie - Westphalia
 A:  Fumes would not kill your flowers, but drifting of the weed killer would.  Apply in the early A.M. or late in the P.M.  Make sure it is not windy.