Plant farming, the next generation.

Like many things we saw, this plant farm had a new, secondary location.  There are new restrictions on plants grown in soil (nematodes) so they are starting to grow above ground on trays in sterile substrates.

My favorite part is the Java Fern growing UNDER the tables.
 I've always said you could grow Java Fern in the dark...

Perhaps they are still experimenting with substrates.  This is a tray filled with chopped foam.
Re-useable and relatively easy to sterilize.  Clever.