Read on a website that too much Nitrogen could mess things up. This is the second year I am doing more than just cutting my dad's grass for him. I am actually landscaping it, putting money into it which I find fun. I may have accidentally allowed the Nitrogen I was spreading on the grass to spray into the plants, very possible.
I will for now on hand fertilize the grass by the plants and use a spreader for the rest of the grass so NO Nitrogen gets into any plants.