Round 1: Chain 3 (counts as first double crochet), work 11 double crochet into the ring. Pull the tail to tighten the ring. Join with a slip stitch to the top of the beginning chain 3. (12 stitches)
Round 2: Chain 3, double crochet in the same stitch. 2 double crochet in each stitch around. Join with a slip stitch to the top of the beginning chain 3. (24 stitches)
Round 3: Chain 3, double crochet in the same stitch. *Double crochet in the next stitch, 2 double crochet in the next stitch. Repeat from * around. Join with a slip stitch. (36 stitches)
Continue increasing with each round until you have 12 rounds total, following the same pattern of increases.
For the floral design in the center, work 5 double crochet into one stitch, skip 1 stitch, slip stitch into the next stitch. Repeat around for a total of 6 petals.
Fasten off and weave in ends.
Your beautiful floral crochet square is now complete!