Here is the possible background stitch worked in one strand of the Waterlilies with an added single stitch in the center of each of the double crosses.
Then, I went on and worked more of the bottom ribbons and put in more of the single strands of Marlitt in the off white and blue. I am down about a third if that much. I also added beads to the two hearts on the outside top right. The top one got clear Japanese size 11 and the bottom one is Mill Hill petite pearl. A little here, a little there.