I love the plaid! I like the blue-green greens a lot, the yellow-green not so much. The blue-greens lend contrast and excitement, IMO. The yellow-green blend too much into the floral.
Like others, I think either one green (the one on the left, not the plaid) or lots of greens. Right now you don't have enough variety in the greens to make it seem scrappy. I'd buy a bunch more 1/4 yard greens and mix them in....using only blue-greens, though.
I think another reason the yellow-green in the right hand block doesn't work is because it's scale is too similar to the scale of the brown print. The other greens work better because their scale is in contract to the brown print.
The yellow-green print could work if you put it with the darker rose instead of the lighter rose. Right now the yellow-green print blends too much into the light rose, and doesn't set off the pretty floral center.
I kind of like the idea of using that big piece of green that you added last as a border. Probably a thin border, and then add something else for a second thicker border.
Lovely quilt! Have fun choosing!