I whipped up a few fabric rosettes the other day. I just used strips of scrap fabric. The strips do not need to be straight on all edges. Tip: Bias strips will be less prone to fray.
With a needle and thread knotted at one end, make large basting stitches on one long edge of the strip. Pull the thread to gather the strip into a rosette. Arrange the fabric into your desired shape, make one last stitch and securely tie off the thread. To make a flower, wrap your thread around the width of the strip, pulling it down to the center and creating petals.
The rosettes take mere minutes to make. Use the rosettes for decoration on clothing, bags or anywhere that could use a little color.