Gutter cleaning or tree removal?

The gutter on the side of the garage is just sprouting with life. It had just hundreds, upon hundreds, of little maple trees growing out of it as if it were a planter. Dancer, bless her heart, climbed up there, plucked the trees out and then dug out the smelly, rotting leaves they were finding such a good medium to grow in. There are maple trees coming up everywhere this year. It is probably because there has been rain every few days and every thing is moist. Funny thing is, a couple of years ago we had a maple tree grow in the rocks around the house. We were so excited about having a tree come up that we carefully dug it out of the rocks and planted it in the yard. For the last couple of years, we have been babying this tree along with extra waterings and put a fence around it to protect it. Our hard work has paid off as the tree is about 5 1/2 feet tall this year. We are planning on putting a few of our plethora of trees in pots to see if we can get some growing well so that if we want to plant a tree anywhere else we will have some at the ready.