I am working on a 3 color GFG now, and I am using the hexie-as-you-go method. LOL. I make 1 flower at a time and sew it into the bigger quilt top. I make enough hexies for 1 flower and then sew the flower together. If it was a scrappy look, it would be better to make a few flowers and then plan out the positioning of them before sewing together on the paths.