I've added borders on my landscape quilt. I wanted to try "string" borders. I used a muslin base for each square (or rectangle) in the border. I stitched and flipped narrow strips until I completely covered the muslin. It was lots of fun because you get to play with an assortment of fabric and use up small scraps because, of course, we never want to throw anything away.
I felt it gives an abstract look to the edge of the quilt. Perhaps, you are looking through the leaves into a sheltered forest spot. But, does the abstract border claim your attention, drawing it away from the center of the quilt? Is it too much?