Thank you for posting @xpilar.
How about a topiary form...the green starters are inside the form and will grow in all directions toward the light.shading the barren surface below.....which btw look a bit like domino game pieces or motorways in a large city......either of which will enjoy the shade of this topiary form. ^__^
Apprecite the opportunity to think on these things.
All the best to you.
Cheers.
Like your description @bleujay
You are the first to comment that there is a big city below on the surface here.
Hehe, not many who see it.
Cheers.