How about something like :
"Colorful foliage in growing season (not green)"
I assume that "growing season" is there to rule out trees that have fall colors when the chlorophyll is gone?
P.S. I modified many lettuce entries and only checked the box if the lettuce had color other than green or in addition to green. (And there had to be a fair amount of color - not just a blush on the tips.) Also, if most photos online showed it with only green or 99% green, I didn't let glowing vendor descriptions carry me away.
Also, I took the liberty of NOT checking the "growing season color" checkbox if I didn't like the looks of it. There are some dull muddy brown-red-green varieties that I just didn't like the looks of, and thought would not be widely enjoyed.
BTW, speaking of growing season color - have you seen the cover of Johnnies Selected Seeds 2014 catalog? Very strong color contrasts in maroon and two tones of green, but I think it's ugly, or at least science-fictionish. Page 24 'Fiero' radicchio. As if it were a human-size Venus Fly-Trap and had some blood spatter from its last meal.
