Ben Flanner teaches you how to build a greenhouse in New York City! In this week’s installment of the Rooftop Farmin Update with Ben Flanner, Ben explains to Erin Fairbanks all of the step required to create a rooftop greenhouse in the city. Hear about the architectural and legal considerations of the project. Find out what’s going down at the Navy Yards; tune into this segment to hear more from Ben and the Brooklyn Grange!