Two weeks ago we sowed tall fescue in a customer's yard. We then fertilized the yard and went on. Yesterday I went to mow the yard and it was like a dandelion forest! She was upset at the CO-OP for selling her seed with dandelions in it, because we did the same thing last year and there were no dandelions so she figured it must of been the seed. I told her that I would come by and spread weed and feed (2,4-d) to kill the dandelions. This was recomended by a landscaping buddy of mine. I don't want her yard to be huge patches of lush grass and the rest just dirt. I really value this customer because she leaves us alone and lets us work with out hassling us. i don't want her yard to die!