Thanks Ewan, just thought would try white background although I don't like white very difficult to get right especially with flowers, always having difficulty with DOF, as I read somewhere, to maximise the depth -of -field available for any given f/stop you need to carefully position your camera so its sensor plane is parrallel with the subject if not you risk the subject drifting out of focus I think this more for insects.
I'll never be good ehough just enjoy trying.