Hi Mike,
These are terrific, especially the first pose! Beautiful child, beautiful dress, beautiful setting. I like how she's doing something with her hands and the expression on her face is better in the first pose, I think.
There's an SOG artist that I think does a terrific job of these "barefoot girls in white dresses" portraits. His name is Hongmin Zou, out of Atlanta. Here's his site:
http://www.hongminzou.com
On your concerns about "too much green" in the background: take a look and see how Hongmin Zou handles it. If you vary the temperatures of the greens, and vary the values of the large masses more than what is shown in the reference photos I think that will help too.
This will be a knock out sample for your portfolio!