Quick Update - It is mid-September and we have had a tough, hot, wet, humid and rainy summer interspersed with extended periods of drought early on. The Sempervivums - especially the young ones are not looking good!!!!
But we expected this.
There are very few plants that will truly be successful on an extensive Florida Green or Vegetated Roof!
For a good source of information on Florida Green Roofs see www.metroverde.com