Hi,,I have a question about new grass seed..I built a new house 2.5 hours north of the cities, and have new grass seed in various stages of growth..I have 2 areas that I planted last fall, that are doing good..My question is..when do I introduce any fertilizer, weed and feed etc..to these areas?..so. Far I have not done anything with these areas..I also have another area that is 6 weeks new, and another area that is 2 weeks new..the rain certainly helps for the seed to thrive..I have a couple more areas I will do this fall..what, if anything, should I do to these areas?..thank you!