Answer: Concentrated fertilizer can definately burn the grass, and nitrogen can remain in place until it weathers away. If you've reseeded but grass hasn't emerged within a reasonable length of time, I'd suspect that there still might be an overabundance of nitrogen in the area. Until it breaks down, grass seed probably won't germinate. Why not try raking the area and removing the affected soil, then putting untreated soil back in the area and sowing seed? Or, you can wait until later this springto reseed, by which time neighboring grass plants will have had an opportunity to use up the residual nitrogen. Either way, by mid-summer your mistake will be less obvious when you survey your yard.
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