I think not. It’s far too themey for me, even though they’re all lovely names individually.
I actually like themes, as long as the names aren’t too phonetically similar. I’d just make sure there are more nature names that you like so a fourth daughter wouldn’t accidentally get left out.
I love them. As has been pointed out, because they are not all overtly ‘floral’ names I didn’t immediately see the association. They just sounded lovely together.
I have a [name_f]Violet[/name_f] 