I'm stumbling too, Woofie. We need to brainstorm this. Who can come up with a phrase to signify intriguing color that isn't standard green?
"Good color, other than green" and "Striking color (not green)" wouldn't work because chartreuse is a good color and a striking color, but it's also green, and I would want it to be included in my search.
Your suggestion of "Unusual foliage color" is the best I've heard so far. If people feel moved to describe the "unusual color," they can describe it in a plant comment.
