That must have been a lot of work… but the result is super cool! You're
making yourself quite a nice place there!
Brian, under overcast light condition, light is bouncing every where and the
result (and consequence) is that since it is all in green around your subject,
the bouncing light is "greening" the scene. The remedy is to read to WB on
one of the dry stones of the wall in the foreground; this should remove the
green cast over your little paradise!
This is the corrected WB version:
And this could be a possible rendition suggestion: