Rapid Rooter Kit. 50 plug tray Rapid Rooter with 50 cell plastic tray and plugs by General Hydroponics. Rapid Rooter is a unique starter plug made from composted tree bark. Naturally occurring microbes colonize in the root zone and help provide a good air to water ratio making for very rapid root growth. This product will get your seeds or clones off to a great start!... — Ships from Portland, Oregon USA....more info.