Why won't grass grow under my bird feeder? I keep sunflower seeds in it.
Hulls from the sunflowers may be shading out the grass. If this seems to be the problem, rake the hulls away periodically to allow sunlight to get to the grass beneath. Or excrement from the birds visiting the feeder may be accumulating to a level that is unhealthy for grass growth. Consider moving the feeder around to different locations in the yard to prevent buildup of bird droppings in one location.