Blanket stitch is a wonderful stitch for open and large motifs. You can use the blanket stitch to fill areas completely or partially. The smaller the space between stitches, the more of the underground fabric you will cover. Blanket stitch is a very economic stitch, leaving not much thread in the back, but a lot on the front. It works best with rounded shapes, like ovals or circles, but also scalloped edges.
Blanket stitch flower tutorials for you to try
Blanket stitch for other shapes
You can use the blanket stitch for other shapes, too. Here is a version to create leaves. The blanket stitch works great for bigger shapes. Teeny tiny things are not its
Flower stitch book
For more detailed instructions, you can get the Flower embroidery stitch book in my Etsy shop. It contains step-by-step photo instructions with detailed explanations.