Vertical Farming and Microgreens

Vertical farming is the practice of producing food in vertically stacked layers, such as in a skyscraper, used warehouse, or shipping container. The modern ideas of vertical farming use indoor farming techniques and controlled-environment agriculture (CEA) technology, where all environmental factors can be controlled.

MicroGreens are a tiny form of young edible greens produced from vegetable, herb or other plants. They range in size from one to one and a half inches long, including the stem and leaves. A microgreen has a single central stem.

Visit A Vertical Farm of MicroGreens in Baltimore City (Fells Point), Maryland (Owners: Larry and Zhanna Hountz)
They use pure water, conventional seeds on 100% organic coconut fiber hydroponic growing pads, as the seed bed, and natural bamboo stakes to keep the fiber off the tray bottoms resulting a true hydroponic environment with seeds-to-harvest in about a week. They sell to local restaurants, with roots attached, for about $30 (in 2016) per tray. They use about 5 gallons of water per day (70 trays @ 1 cup per tray) costing about $6 to grow one tray including electricity (about $125/month) using 12-volt LED lighting.
Video (forward to minute 20)
Information Link 1
Information Link 2

See Also:
Replenishable Water and Food Sources
Vertical Farming at Home
How to Grow Microgreens
Hydroponic MicroGreens Supplies