Sustainable Landscape Council
The company I work for - Cornerstone, is one of the founding members of the Sustainable Landscape Council. The SLC was formed by private industry partners who found a need to create a common base of views and standards regarding sustainability with the practicality and experience of those in the business.
You can visit the website at www.sustainablelandscapecouncil.com
Let me know if you have questions.
I am also a certified Florida Green Building Certifying Agent.