I wasn't getting a feel for how the lighting was working for the white rose, and thinking that I was getting it a little too dark.
So what I did was add some of the background black to see if it would help illustrate the balance I needed to obtain.
Normally I don't add the dark background until I feel that the subject is pretty much completed.
I can see now that I haven't really lost my whites on the left and I definitely need to add more shading on the right. I think I'm going to do some more blues and purples. Then I'll finish the background and look at it again for adjustments.