Rooftop gardens can be gorgeous, lush, tranquil oases in a city, but must be planned properly. Here's what you need to consider ahead of time.

The larger the city, the smaller the affordable space. A vertical farm poses an urban gardening solution to anyone lacking a backyard or a roof. If you’ve got a roof, that works too.

3. Rooftop Gardening Among the many unique tiny urban garden ideas, rooftop gardening is one of the most creative ways to make use of what you have.

The condo always wins. And single-story — or single-rooftop — gardens can’t feed the masses. This realization was the seed that bloomed into vertical farming, says Despommier.

Algae-Growing Vertical Garden Sprouts up in Manhattan Lobby Design Lifestyle Travel Destinations 09/12/2014 under Design, Destinations, Space, Urban Farming ...

At the industrial Portland warehouse of solar-power and green-roof purveyor SolTerra Systems, 1,200 plants do the dusting. “We used to mop twice a week,” says SolTerra president Brian Heather of ...