The latter is likely what would be used at Target, who has announced that they will be testing out a vertical farming system starting in Spring 2017. The trials will be done at different locations across the country that have not yet been announced, but the store plans on starting out with leafy greens and possibly building their way up to potatoes, beets, and zucchini.
Credit: Inhabitat
Target collaborated with IDEO and the MIT Media Lab and created Food + Future coLab, a group that is "pushing the edges of technology, business, and design to create new, impactful ventures" that change the way we know and create food. They have been researching in-store micro-farming for over a year and their findings will finally be put to the test next year. Greg Shewmaker, one of the entrepreneurs at the coLab, said,
"Because it's MIT, they have access to some of these seed banks around the world, so we're playing with ancient varietals of different things, like tomatoes that haven't been grown in over a century, different kinds of peppers, things like that, just to see if it's possible."
Credit: Inhabitat
Read more at http://www.trueactivist.com/target-stores-to-launch-in-store-vertical-farms-to-grow-their-own-crops/.