Tony Beran is standing in the kitchen at the Lake Avenue Restaurant in Duluth, Minnesota, with a head of romaine lettuce in one ... to-ceiling racks made of PVC pipe, an idea they got online ...

A team of five students is growing hydroponic lettuce in PVC pipes at the University's biology building green house. They started growing the lettuce in February and will continue to grow it until ...

A representative for Lettuce Grow said it was on track to do 10 times the sales compared with last year. Meanwhile, D.I.Y.-ers are building hydroponic gardens out of PVC pipes and five-gallon buckets.