
05-07-2008, 04:07 PM
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Member
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Join Date: May 2007
Zone: 10a
Location: Somis CA
Posts: 57
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Yes you are right, any voids inside the mount adds to the porosity, although I only put a tablespoon in the mix, and the larger size mount is pretty big, about 10" wide and 24" high so thats not much fertilizer anyway.
All cement has damaging alkali salt in it and was stopping my orchids growing roots onto the surface until I figured how to remove the alkali and other salts from the dry cement.
The finished product is very porous and retains water for hours.
Jerry
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