I came across this amazing collection of hanging plants on ApartmentTherepy.com today.  It makes me think about a network of man-made webs around and between plants.  A visual connection between plants, much like the network of roots that tangle beneath the surface.  I think there is something beautiful about creating a physical network to symbolize the reliance plants have on one another.  Each man-made web would cradle and support a nearby plant.  And if the plant were removed from the hanging string all the other plants would be thrown off balance.  It could be a really beautiful installation.