Bat guano, Worm castings soil mix

Discussion in 'Growing Marijuana Outdoors' started by 319727, Jan 11, 2010.

  1. hey GC, im new to growing and i grow outdoors, i was wondering how u use these two products in a soil mix, when too add them, how much to add into a soil mix. i was also wondering if using fish emulsion is good too, thanks alot help appreciated.
     
  2. Always good. I recently did this so I can help. I had a 3 Gallon pot with Fox Farms Ocean Forest mix (Fish Emulsion included), 10% of Mexican Bat Guano, 15% Worm Castings, and an additional 10% Perlite (In FFOF also) to help lower the PH since I didn't have lime.

    Look out for different Bat Guanos also. Some are high in N others high in P.
    More than 15% of N Bat Guano in your mix can cause burn
    More than 20% Worm castings can impair root development
     

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