From the blog:
Beautiful dahlias for Mothers Day!! For each stem I just used 3 pipe cleaners  and twisted one end into a loop to make my Magic circle. Once the middle of the flower was crocheted, I twisted the loop a little more to make it tighter and closed.

Supplies:

I used 4.75 MM hook and Red Heart  yarn
Pipe cleaners
Use a variety of yarn and hooks for different looks