Beautiful! I would outline the flowers then give them some detail with thread painting - eg veins on the leaves, round pebbles to represent seeds in the centre of the sunflowers etc. Then I'd give some texture to the background with either pebbles or a close stipple. The border I would do a trailing vine with leaves and abstract flower shapes. But then I like a lot of FMQ - especially in wall hangings. Otherwise you could just outline the flowers then quilt concentric straght lines around the border, perpendicular to the stripes. :-D