Green Roofs - Irrigation and Green Roofs - Green Roofs for Florida and the Southeast

As I travel across the Southeast, I take the opportunity to stop and study plants growing in different places within the urban core.  I was amazed at the variety of plants growing out of crypts and other structures in New Orleans.  Hot, dry and desolate, the stone structures successfully supported a number of plant species that apparently had been growing for quite some time.  Just goes to show - you do not need to irrigate a green roof.....