With the central color (pink), make a magic ring.
Work 12 sc into the magic ring and close with a sl st into the first sc.
Petals:
Round 1: Change to petal color (white). Ch 3 (counts as the first dc), 1 dc in the next stitch, ch 3, 2 dc in the same stitch. Repeat from * to * 5 more times, totaling 6 groups of 2 dc. Close with a sl st in the 3rd ch of the beginning ch.
Round 2: In each ch-3 space of the previous round, work (2 dc, 1 tr, 1 tr, 2 dc). Close with a sl st in the first dc of the round.
Leaves:
Change to leaf color (blue). In any space between the petal clusters, attach the yarn and work: (2 tr, 1 tr, 2 tr, 1 sl st). Repeat from * to * around the entire piece. Close with a sl st at the beginning of the round.
Arch Row:
With the white color, attach the yarn in any sl st of the previous round. Ch 4, skip to the next sl st and work 1 sc, ch 4. Repeat around the entire piece, closing with a sl st in the first sc.
Square Border:
Round 1: With the pink color, in any ch-4 space, attach the yarn and work: 2 dc, ch 2, 2 dc. In the next ch-4 space, work: 1 sc, ch 2, 1 sc. Repeat from * to * around the entire piece, closing with a sl st in the first dc.
Round 2: Ch 1, work 1 sc in each stitch around, including 3 sc in the corners (in the ch-2 space). Close with a sl st in the first sc.
Access the crochet squares category here
Finishing:
Fasten off and weave in the ends.

Notes:
Colors can be changed according to preference.
Adjust the size of the square by increasing or decreasing the number of rounds.