How to Build a Sustainable Grow Tower - Grow 40 plants in 2 Sq. Ft. - YouTube http://buff.ly/1hZ09tT -- Find out how to make an organic, sustainable, cheap, easy, and efficient grow tower: for $6 and will grow 40 plants in 2
square feet. With the power of vermicomposting, this is a self fertilizing, and semi-self watering system.
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