Aquaponics farm closed, farmer hopes to restart it MICHAEL BURKE mburke@journaltimes.com, January 11, 2012 **FILE PHOTO** Johanna "Jo" Hearron-Heineman of Natural Green Farms, LLC., picks butterhead lettuce in an indoor hydroponics warehouse on Wednesday, April 12, 2010. Natural Green Farms grows lettuce and raises fish on the third and fourth floors of the former J.I. Case Plow Works building, 615 Marquette St. in Racine, Wis. Natural Green Farms uses waste nutrients from their tilapia fish farm to fertilize their lettuce operation, which can grow 7,000 heads of butterhead lettuce every 35 days. Lettuce from Natural Green Farms is used at the Summit Restaurant, the Corner House and at local Sentry grocery stores. / File photo Scott Anderson scott.anderson@journaltimes.com Buy this Photo at jtreprints.com Natural Green Farms Related Stories Aquaponics alive, expanding in former Case plow factory After lettuce and fish, maybe solar, fuel cell RACINE — A novel aquap...