LINKS TO PATTERN PARTS 1 AND 2...at the bottom of this post.
ROUND 6: sl st to the 3rd dc of the 'petal', 6ch sts, sc to the 3rd dc of the next petal repeat until you complete round with a sl st.
ROUND 7: sl st, into the chain loop, 8dc in each loop, sl st to complete the round. (96sts)
ROUND 8: sc in every sts. sl st to complete round. (96sts)
ROUND 9: 3dc, in first st, miss 2 sts 3 dc in next stitch, repeat until round complete, sl st to finish round. (32 granny shells of 3dc)
ROUND 10: sl st, to next space, 3dc granny shell in each space with 1ch sts between each granny shell. sl st to finish round (32granny shells 32ch sts )
ROUND 11: Repeat round 10 (32 granny shells and 32ch sts)
ROUND 12: Repeat round 10 (32 granny shells and 32ch sts)
ROUND 13: 1dc in space, 1dc in each of next 3 sts, repeat to complete the round, sl st to finish round. ( 128 sts)
ROUND 14: 15: 1dc in each st, sl st to finish round. (128sts)
ROUND 16: Repeat round 13 but with an increase of 16 stitches approximately every 8sts, you need to have 144 sts to match the front. sl st to compete round.
Wrong sides together match stitch for stitch with 1sc in every stitch to join the front to the back
Do 36 x 5dc shell stitches to finish the cushion, sl st to complete round.
Add buttons and loops or a zip.
Sorry it took so long to do the complete pattern