I made 9 squares and the blanket ended up being 180 cm square. I joined my squares using a different stitch from amino crochet (https://mijocrochet.se/2017/08/15/mijo-granny-join-ihopvi...) and ended up making the border with 3 rows of BP tr in left over colours. It’s big enough to be a bedspread and is very heavy, soft and warm.
I won’t be in a hurry to make it again, as all those petals nearly killed me!