This is a very pretty image and I think the white background works here. I really like the color and that the background brightness doesn’t seem to overpower the subject. The only think that I would like to see different (and this is not a big deal) is the bud on the top right corner bothers me. I think the picture would have been better if it were just a stalk trailing out of the picture like the one above it.
Great macro, lighting and colours are perfect. Personally the composition feels a little tight and a touch awkward, but from a technical standpoint you are dead on.