If you don't follow ALL of these instructions, you will not succeed in
killing the violets. As previous writers have said, they are
extremely difficult to get rid of.

I hand pull every day, I don't have a weed free garden by far but I pull a
little every day if it isn't raining hard. My other pain is creeping Charlie,
which comes under the fence from my neighbor... They also have a violet
problem.... I don't mind the violets in the spring when they bloom, I start
pulling once they are spent.
Colleen
zone 5 Connecticut