[GrowColt] shows you how to modify a lamp timer for use with hydroponics. You can pick up this type of mechanical timer at most local big box stores for around $5. The timer plugs into an outlet, and ...

It comes with two timers, one for lights and one for the water pump, which can be set and then left alone, making it simple to set up. This vertical hydroponic garden is not restricted to indoor use; ...