DebraK, beautiful dainty wallhanging!
ladysuds, there is a book from That Patchwork Place called Watercolor Quilts by Pat Maixner Magaret & Donna Ingram Slusser that teaches this technique in detail, maybe you could find it and use a similar idea?
Google shows lots of pictures of it.
https://www.google.ca/search?q=Water...w=1280&bih=867