Making crochet flowers for hats begins with a small circle of chain stitches for the center and proceeds with three rows of double-crochet stitches. The edging of the flower uses a final row of single-crochet stitches.
To begin crocheting flowers for hats, form a loop on the hook and make five chain stitches. Form a circle by joining the ends of the chain using a slip stitch.
To make the flower pattern, first make three chain stitches. Then crochet 15 double crochet stitches within the circle. Join the end of the row just created with the top end of the three chain stitches with a slip stitch. Turn the pattern.
Again make three chain stitches and crochet two double crochet stitches in every stitch of the row. Join the ends of this row using a slip stitch. Make three more chain stitches and flip the pattern over. Create one more row in a similar fashion and end it with three chain stitches. Turn the pattern once again. The flower contains three rows.
Finally, make one chain stitch and crochet single crochet stitches in every stitch. Fasten at the end and cut the yarn. To finish the flower, sew any openings at the bottom of the flower using thread and needle. Tie the ends of the yarn together and leave around four inches for affixing onto the hat.