Wall/not wall

I'd like it if all my walls and fences and trellises were made out of slim branches of willow or bamboo. Earlier in the week I was cleaning vines out of the pine trees in front of the house. I roped them into circles and love the way the leaves flow out of the wreaths... but they wither and die.
This is wall/not wall. It's as much there as not there. Shielding, but not hiding.