Flowers...i will always come back to this.. | Nature and Wildlife photos | Photo Forum

Beautiful, especially the second one.  Yes, a higher F-stop would increase the depth of field which would be good, although maybe you were going for the small focus area.  In the second picture in particular I think the narrow depth of field works–the center is sharp and then each progressive set of petals is slightly less in focus.  It gives it a very 3-D look.  For the third one I don’t see that because of the angle so there maybe a smaller aperture would help.  Depending on your equipment and the size of the flowers, you might have to do focus stacking or something like that to get everything in focus.