Step 1 - Designing
Step 2 - Sorting
Organize your 2" x 2" squares into three piles: dark, medium and light. Darks usually have a background that is black or a very dark color with foreground colors that are very vivid and bold. Lights usually have a white or very light colored background with foreground colors that are pastel or muted. Sometimes it helps to have a "medium-dark" and "medium-light" pile.
Step 3 - Arranging
Step 4 - Finishing
Piece together, quilt and bind.
Resources If you don't have lots of brightly colored floral fabrics, you can buy a set of 200 pre-cut 2" x 2" squares. You can also buy them in strips and fat quarters. A handy tool for making watercolor quilts using 2" squares is "Quilt Fuse," a fusbible webbing that has a 2" x 2" grid marked on it. Arrange your fabric on the Quilt Fuse using the grid, fuse them in place with an iron, then fold the rows over and sew a whole row at one time.
Here are some watercolor quilts that I designed and made: Watercolor Sunset Watercolor Swirl Uptown Downtown If you've made a watercolor quilt, please post a link to a photo of it in the comments section.