I used yarn to mark specific areas e.g. where the flower stems begin. So far I'm pleased with how it is coming along. I made a version of this using #10 thread, Red heart.
I made the design a little bit different. These two are my current active wip. The Afghan is so bulky at this point to be portable enough to take on trips. This is one reason I started the Thread crochet version. Below are photos of the thread version:
These are experimental crochet work and I hope to write the pattern one of these days. For now, I'm learning a lot, as you can see, all the stitches varies, I'm learning what works and what doesn't in making a circular design.