I find this charming photo absolutely beautiful in both composition and post processing! The base of the tree unfolding into the color of the grass is a wonderful use of Desat!! The red car balanced by the wine barrel contributes a charming vintage flavor to this timeless masterpiece.
Nice car, but the desat seems to be lacking. I think you may have left to much in for color. It makes the image look very uneven and lacking in obvious subject.
Your selective destat, left too many colors around, to where I don't know where to look. You have a blue sky, partial green grass, yellow flowers, purple flowers, red car, brown tree..etc. Basically everything is in color except the leaves in the trees and brown dirt.
the photo itself is a nice capture though. the only issues in the photo lie with Photoshopping it to fit the challenge.