I used to have just the dark maroon color, but I don't have them anymore. For some reason, I can't get them to grow at my house. Maybe because I don't have a formal garden that gets watered regularly? I don't know.
However, I used to plant them in the little tiny garden at the roller rink. The owners of the rink watered the garden daily, and they used some kind of plant vitamins (Miracle Grow?)......and the plants/flowers thrived!!!!! The garden usually only had room for about 3 cockscombs (along with a few other flowers), but they were always amazing!!! The stems were at least 6 inches across and 2 inches wide. Each plant had 8-10 flowers that were about 18 inches across.....they were stunning!!!!
In the fall I would gather the flower heads and dry them in buckets over the winter. In the spring I would gently shake them and the seeds would all fall into the buckets.
I live 2 hours away from the roller rink, so unfortunately, it got to be to hard for me to keep up with their care. I sure do miss them. I still have seeds, maybe I'll try growing them again next year.