I'd be inclined to put two of the flowers closer together than the third one. Perhaps that's what henrik is saying.
Having them all lined up in a straight diagonal, with the same distance between, gives it a little bit of a regimented feel, which is in contrast to the beautiful floral images. Of course you could always decide that that's the idea you want to express ... that dichotomy.
I LOVE your flowers!!! They're totally luscious! Once you settle on a composition, I look forward to seeing the finished piece!
By the way, I admire your blocking out several compositions before you paint. I am often guilty of going straight to canvas or paper before quite figuring out what I'm doing. Sometimes it works, sometimes it doesn't.