Thank you but it was easier than maybe expected. Since LR is unfamiliar to me, I'm still finding new stuff. I wondered what that little box was in the tone curve. When I clicked, I noticed it allowed me to adjust the individual RGB channels which makes color adjustments easier. I too use desaturate often. When using it on the background, the rest by contrast automatically looks better. A high-pass copy as vivid light blend in and that's it.
Flowers are great to experiment with. You can try about everything.
