A year and half ago, volunteers installed a green roof on top of our Salt Lot storage box using Gaia Soil as a growing medium. At a 4″ depth, the green roof could not retain enough water to support native grasses or asters. However, the Sedum has continued to successfully colonize the bed; even through last year’s hurricane, they are still flourishing in a vibrant red color.

May 2013:

March 2013:

Here are some photos of the green roof in different months last year (some require a keen eye), all taken using balloon mapping methods:

April 2012:

July 2012:

October 2012:

December 2012:

Our green roof is an excellent example of vegetation thriving in a less-than-ideal urban environment such as the Gowanus. Be on the lookout for a new green wall project, coming this Spring/Summer!