Time to notch up the values and contrast on the limes. You might initially think - Hey, not much difference from the previous picture! But look closely and compare - you'll see more green involvement. I use lots of washes to build up my colors and enable subtle blending from one area to another. Speaking of looking and seeing - here's one of my favorite quotes (it was on a poster I had hanging in my classroom when I taught junior high art) - Stand still and look until you really see.
Wishing you clear seeing,