I, personally, am not a lawn-care expert, but... My pastor's family lives in a duplex built on land that was abandoned by our local farmers for a reason (plus it's a flood plain [plane?]). Nonetheless, he has the best looking lawn because my dad fixed it for him -- he's not a lawn-care expert either, but he is an expert in soil nutrition. I can pass questions on to him. (Though there's only so much that can be done over the internet without soil samples.)
I do know that the first thing he'd want to know is what kind of soil you've got. So... what kind of soil have you got?
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Jennifer Petrik
Member, Grace Reformation Church
Attending, Escondido Reformed Baptist Church
Student, Westminster Seminary California (M.A.H.T.)
Woodland/Escondido, CA
per caliginem