I think
Zinnia is a nice name and I'm surprised I don't like it more. I seem to like a lot of floral names, especially ones that are under-utilized. Z names are relatively uncommon and I think that adds a bit of spunk to the name. I think that contrasts in a good way with the soft floweryness of the name. I'm not crazy about Zinny but I think it makes perfect sense as a nn for a little
Zinnia.
“It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.”
~Mark Twain