Lawn and Landscaping- what fertilizer and what should we use?

Ken19048417
by Ken19048417
We have some bare spots with tree roots sticking out in many areas and with Crabgrass moving in, the previous owner never raked the lawn so the lawn is thick with dead grass and grass is trying to grow through. What should we do and when should we use Fertilizer? Thank you for helping in this matter.

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