well, i learned a little reading those 10 pages of mess. it's too bad the moderator couldn't pull out all the meaningless banter, name calling, and my brain is larger than yours statements. it would save me so much time. here is my question: once you have this barrier set in place from CGM after say 3 years how can you seed at all? from my understanding it isn't selective in inhibiting seed germination whether it is bluegrass or crabgrass.