There is a difference between your designer singles and the stunted flowers from the seed packs. Here is another example from last year. I bought Creamy Yellow Giant. I got one really good flower on one of the plants. Unfortunately, someone decided to pick that one so I never saw it fully open. The rest looked like some version of the third photo. This is a type that has semi doubles and doubles. Really, I am always ready for a dud pack of zinnias. I never trust that they will perform well. That is not to say that there aren't some beautiful results available.
The one perfect flower as pictured at website.
Here is a semi double, most likely the second best flower I got from a few plants because it is the one I photographed.
This is how the rest was more or less.
Not to discourage you, jbh61. They are worth growing. I have gotten beautiful results too and that is why I still grow them.
