I completed the first Wilton Method cake decorating class--Building Buttercream Skills. I really enjoyed it, but found it VERY challenging. The course is 4 classes; each class is 2 hours. They pack a ton into each class.
The teacher showed us how to do each flower. I had never iced a cake before this course, much less try to make a flower. I found myself wishing she could review the flowers of the previous class, so we could have a second look at making the flower. I didn't see anything on the web, showing how to make the zinnia--it was a new flower for the newly updated Course 1.
In desperation, I contacted my teacher a month later. She helped me out, and I am very grateful. To make sure I didn't forget how to do these flowers, I made these videos for zinnia and their daisy shape:
Here is the video for the daisy. There are several ways to shape a daisy--with a rose tip, or with a #12 tip. Here is the one we learned in class:
I hope this will help you in your cake decorating, also! Practice, practice, practice! Buttercream flowers are challenging. You have to monitor icing consistency, how you point the tip, and turn the flower nail all at the same time.
All the best,