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Old December 11, 2014   #25
rnewste
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Join Date: Apr 2007
Location: Campbell, CA
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There is actually very little scrap in building the Rev. 3.9 design (a 1 inch wide belt from the inner container is all that is recycled). The purpose of the second inner container is to funtion as a "double-wall" to provide a thermal barrier from the Sun's warming of the outer container, intended to keep the temperature of the potting mix at a lower level.

Yes, the EarthTainer design costs more to build than some of the cheaper Internet versions - but I published it as a fully integrated, field tested design with cage system that works well and has the durability to last for many Seasons.

Ray Newstead
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