Which tree species root over rock?

[Yamabudoudanshi]

Your local maple.

I wanna see mugo from seedling too!

Sorce

I have a bunch of them. If they survive the summer, I'll eventually try to stick one on top of a rock.

 

[James W.]

Mugos work well if you start small enough

 

[leatherback]

This thread popped up in my alerts. Thought it would be fair to all that commented that I show what I ended up going for.. Mostly trident maples I am afraid. But I did do a fast-to-cork-up elm too