I would SITD in the green stashing and outline the flower and the leaves. I would stipple in what ever stitch you are comfortable with doing maybe circles in the background. I would do some curve quilting and echo it in the flower. I would draw your block on paper and try some doodling. Might just crosshatch the border if that is where the leaves are. That kind of stitching always looks so soft and pleasant when mixed with appliques. Cute fabrics !!