As long as you have a tree within 70 feet of your house, you’ll get stuff in your gutters from the tree. Fall foliage travels 20 to 30 feet from any tree. Spring foliage will travel 70 to 80 feet from any tree. The spring seedlings are designed to be carried great distances by the wind.
If this is the case for you, don’t be surprised if you go outside and look up and see grass or small trees growing out of your gutters. This is the seedlings implanting in the bed of soil on the bottom of your gutter, caused by the buildup of roof granules combined with the dust, dirt, and pollen.