Last year a farm floated into the city on a barge and this coming summer a farm will sprout at PS1, but will a sustainable urban farm ever take root in New York for good?

WebUrbanist has the top 5 designs for a city farm (the first of which may be going vertical in Vegas soon). One design, the first of its kind, is a "vertical farm project undertaken by Chris Jacobs in cooperation with the grandfather of skyscraper farm concepts: Dr. Dickson Despommier of Columbia University." (Last year NYMag visited Despommier's ideas of transforming skyscrapers into crop farms.)

Which design would work for New York? Check out some renderings below -- and until our skyline gets a little more green, be sure to head to that public farm in LIC this summer!