|Florida living wall - green roof by Mother Nature, Resurrection fern, Pleopeltis polypodioides growing out of a concrete bridge platform|
How does she do it? The best way is to examine the surrounding ecology as an integrated unit.
The concrete slab provides a growing platform similar to rock and gathers solar heat during daylight hours, providing a warm area for the plant to attach roots.
The creek below contributes humidity to the air. A bioswale could mimic this water source below a concrete wall in the urban core.
Adjacent trees provide shade and tell the green roof or living wall designer that resurrection fern may probably grow well in the shade.
And so much more information right in front of my face. Ten minutes studying the natural living wall creation told me more than hours worth of reading would have.
Mother nature is such an amazing artist and teacher!