Should I grow weed using coco fiber or rock wool?

Top Answer

Medical Jane

Last updated: June 1st, 2016

Instead of using soil as a medium to hold the roots of your medical marijuana plants, you can use an inert medium — something that does not have the quality problems found with ordinary soil — something like coco fiber or rock wool.


  • Almost as easy as growing marijuana in plain soil.
  • Better yields than soil.
  • Almost as cheap and simple as plain soil.
  • The process is generally cleaner with fewer bugs and mess..


  • Requires special fertilizers which are more expensive.
  • Requires the purchase of coco fiber. This is not very expensive, but you may have to find a local store that stocks it.

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