Thanks for the link...interesting! How does it self-water?
It doesn’t really ‘self-water’...the box has a reservoir of water in the bottom that you keep filled...just run water from a hose down the fill tube until water starts running out from the overflow drain. The plants access all the water they need as they need it. Just make sure that it never runs dry (it would take a breathtaking level of neglect for that to happen). I have a number of these EB’s...they grow just about anything anywhere. Drought never a concern because YOU supply the water. No weeding.
I have grown tomatoes, sweet and hot peppers, broccoli, lettuce and cucumbers with great success in Earth Boxes...practically fool-proof. If I ever hit the lottery; I would be bale to buy enough Earth Boxes to accommodate all the varieties of tomatoes and peppers I have seed for...approaching 300...