How to “Increase” in Crocheting
6. Third row: Make in same way as second row, but increase, or widen, the petticoat by putting 2 double crochet stitches in every sixth stitch.
7. Fourth row: Like third row.
8. Fifth row: Like third row.
9. Sixth, seventh, eighth, ninth, tenth and eleventh rows: Like second row—that is, with no widening or increasing.
10. Twelfth and last row: “Increase,” by putting 2 double crochet stitches in every sixth stitch.
Trim bottom of petticoat with scallops.