I’m with QuiltE. The design doesn’t need a border. In fact, the outer half blocks form their own cool scallop pattern. I know the LC blocks are time consuming, but I really think another row of whole blocks plus 1/2 blocks, as shown, around the outside, would look great. Then if you still needed something, maybe red narrow (about 3-4”) birder and a scrappy binding would be cool. There us so much visual interest in the pattern already that a solid border would not be boring—it’d be calming.