Jun. 25—All it takes is just a little water and fertilizer to grow a head of lettuce with a low-cost, efficient system of hydroponic gardening widely known as "the Kratky method." All it takes is just ...

[Billy] has a special interest in passive hydroponics (also known as the Kratky method), which is a way of growing plants in nutrient-rich water that does not circulate. As the plant grows and liquid ...

Jensen Uyeda, an extension service agent with the University of Hawaii at Manoa College of Tropical Agriculture and Human Resources, places Romaine lettuce seedlings into 2-inch holes drilled into the ...