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-   -   what is a growing medium? (http://www.hydroponicsonline.com/forums/showthread.php?t=1298)

kelvin 02-14-2009 06:39 AM

what is a growing medium?
 
what is a growing medium?????

Ron 02-14-2009 06:40 AM

Grow rocks, perlite, rockwool, sand, air, or any inert material free form harmful chemicals that could be harmful to the plants. You add the nutrients to the medium for your plants to use. Your plants don't get their nutrients from the medium.


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