I planted last year. The grass seemed to come up well. Lot of the grass is long and brown yet. Few area are starting to green. I have heard it is ok to dethatch the yard with a mower and a dethatching blade. Is it ok to use Scotts halt and crabgrass seed later the same day and then use fertilizeer in 2 weeks when I turn on my underground sprinklers? Basically I am looking for any advice on a 1 year old lawn.